Update index

Author: marcos-dv

README.md

@@ -145,6 +145,7 @@ The first two notebook cells are modified to ensure that requirements are instal
 |Project management: Minimize project costs by balancing task costs, risks, and late penalties.|[![Investment_project.ipynb](https://img.shields.io/badge/github-%23121011.svg?logo=github)](https://github.com/ampl/colab.ampl.com/blob/master/authors/mikhail/Project_management/Investment_project.ipynb)|[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/ampl/colab.ampl.com/blob/master/authors/mikhail/Project_management/Investment_project.ipynb)|[![Open In Deepnote](https://deepnote.com/buttons/launch-in-deepnote-small.svg)](https://deepnote.com/launch?url=https://github.com/ampl/colab.ampl.com/blob/master/authors/mikhail/Project_management/Investment_project.ipynb)|[![Open In Kaggle](https://kaggle.com/static/images/open-in-kaggle.svg)](https://kaggle.com/kernels/welcome?src=https://github.com/ampl/colab.ampl.com/blob/master/authors/mikhail/Project_management/Investment_project.ipynb)|[![Open In Gradient](https://assets.paperspace.io/img/gradient-badge.svg)](https://console.paperspace.com/github/ampl/colab.ampl.com/blob/master/authors/mikhail/Project_management/Investment_project.ipynb)|[![Open In SageMaker Studio Lab](https://studiolab.sagemaker.aws/studiolab.svg)](https://studiolab.sagemaker.aws/import/github/ampl/colab.ampl.com/blob/master/authors/mikhail/Project_management/Investment_project.ipynb)|
 |Quick Start using Pandas dataframes|[![pandasdiet.ipynb](https://img.shields.io/badge/github-%23121011.svg?logo=github)](https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/pandasdiet.ipynb)|[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/pandasdiet.ipynb)|[![Open In Deepnote](https://deepnote.com/buttons/launch-in-deepnote-small.svg)](https://deepnote.com/launch?url=https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/pandasdiet.ipynb)|[![Open In Kaggle](https://kaggle.com/static/images/open-in-kaggle.svg)](https://kaggle.com/kernels/welcome?src=https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/pandasdiet.ipynb)|[![Open In Gradient](https://assets.paperspace.io/img/gradient-badge.svg)](https://console.paperspace.com/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/pandasdiet.ipynb)|[![Open In SageMaker Studio Lab](https://studiolab.sagemaker.aws/studiolab.svg)](https://studiolab.sagemaker.aws/import/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/pandasdiet.ipynb)|
 |Quick Start using lists and dictionaries|[![nativediet.ipynb](https://img.shields.io/badge/github-%23121011.svg?logo=github)](https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/nativediet.ipynb)|[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/nativediet.ipynb)|[![Open In Deepnote](https://deepnote.com/buttons/launch-in-deepnote-small.svg)](https://deepnote.com/launch?url=https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/nativediet.ipynb)|[![Open In Kaggle](https://kaggle.com/static/images/open-in-kaggle.svg)](https://kaggle.com/kernels/welcome?src=https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/nativediet.ipynb)|[![Open In Gradient](https://assets.paperspace.io/img/gradient-badge.svg)](https://console.paperspace.com/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/nativediet.ipynb)|[![Open In SageMaker Studio Lab](https://studiolab.sagemaker.aws/studiolab.svg)](https://studiolab.sagemaker.aws/import/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/quick-start/nativediet.ipynb)|
+|Refinery production and shadow pricing|[![refinery-production.ipynb](https://img.shields.io/badge/github-%23121011.svg?logo=github)](https://github.com/ampl/colab.ampl.com/blob/master/authors/marcos-dv/educational/refinery-production.ipynb)|[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/ampl/colab.ampl.com/blob/master/authors/marcos-dv/educational/refinery-production.ipynb)|[![Open In Deepnote](https://deepnote.com/buttons/launch-in-deepnote-small.svg)](https://deepnote.com/launch?url=https://github.com/ampl/colab.ampl.com/blob/master/authors/marcos-dv/educational/refinery-production.ipynb)|[![Open In Kaggle](https://kaggle.com/static/images/open-in-kaggle.svg)](https://kaggle.com/kernels/welcome?src=https://github.com/ampl/colab.ampl.com/blob/master/authors/marcos-dv/educational/refinery-production.ipynb)|[![Open In Gradient](https://assets.paperspace.io/img/gradient-badge.svg)](https://console.paperspace.com/github/ampl/colab.ampl.com/blob/master/authors/marcos-dv/educational/refinery-production.ipynb)|[![Open In SageMaker Studio Lab](https://studiolab.sagemaker.aws/studiolab.svg)](https://studiolab.sagemaker.aws/import/github/ampl/colab.ampl.com/blob/master/authors/marcos-dv/educational/refinery-production.ipynb)|
 |Retrieve Solution pool with AMPL and Gurobi|[![solution_pool.ipynb](https://img.shields.io/badge/github-%23121011.svg?logo=github)](https://github.com/ampl/colab.ampl.com/blob/master/authors/marcos-dv/tutorials/solution_pool.ipynb)|[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/ampl/colab.ampl.com/blob/master/authors/marcos-dv/tutorials/solution_pool.ipynb)|[![Open In Deepnote](https://deepnote.com/buttons/launch-in-deepnote-small.svg)](https://deepnote.com/launch?url=https://github.com/ampl/colab.ampl.com/blob/master/authors/marcos-dv/tutorials/solution_pool.ipynb)|[![Open In Kaggle](https://kaggle.com/static/images/open-in-kaggle.svg)](https://kaggle.com/kernels/welcome?src=https://github.com/ampl/colab.ampl.com/blob/master/authors/marcos-dv/tutorials/solution_pool.ipynb)|[![Open In Gradient](https://assets.paperspace.io/img/gradient-badge.svg)](https://console.paperspace.com/github/ampl/colab.ampl.com/blob/master/authors/marcos-dv/tutorials/solution_pool.ipynb)|[![Open In SageMaker Studio Lab](https://studiolab.sagemaker.aws/studiolab.svg)](https://studiolab.sagemaker.aws/import/github/ampl/colab.ampl.com/blob/master/authors/marcos-dv/tutorials/solution_pool.ipynb)|
 |Robust Linear Programming with Ellipsoidal Uncertainty|[![tip6_robust_linear_programming.ipynb](https://img.shields.io/badge/github-%23121011.svg?logo=github)](https://github.com/ampl/colab.ampl.com/blob/master/authors/glebbelov/modeling-tips/tip6_robust_linear_programming.ipynb)|[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/ampl/colab.ampl.com/blob/master/authors/glebbelov/modeling-tips/tip6_robust_linear_programming.ipynb)|[![Open In Deepnote](https://deepnote.com/buttons/launch-in-deepnote-small.svg)](https://deepnote.com/launch?url=https://github.com/ampl/colab.ampl.com/blob/master/authors/glebbelov/modeling-tips/tip6_robust_linear_programming.ipynb)|[![Open In Kaggle](https://kaggle.com/static/images/open-in-kaggle.svg)](https://kaggle.com/kernels/welcome?src=https://github.com/ampl/colab.ampl.com/blob/master/authors/glebbelov/modeling-tips/tip6_robust_linear_programming.ipynb)|[![Open In Gradient](https://assets.paperspace.io/img/gradient-badge.svg)](https://console.paperspace.com/github/ampl/colab.ampl.com/blob/master/authors/glebbelov/modeling-tips/tip6_robust_linear_programming.ipynb)|[![Open In SageMaker Studio Lab](https://studiolab.sagemaker.aws/studiolab.svg)](https://studiolab.sagemaker.aws/import/github/ampl/colab.ampl.com/blob/master/authors/glebbelov/modeling-tips/tip6_robust_linear_programming.ipynb)|
 |Roll Cutting - Revision 1 & 2|[![pattern_tradeoff.ipynb](https://img.shields.io/badge/github-%23121011.svg?logo=github)](https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/examples/pattern_tradeoff.ipynb)|[![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/examples/pattern_tradeoff.ipynb)|[![Open In Deepnote](https://deepnote.com/buttons/launch-in-deepnote-small.svg)](https://deepnote.com/launch?url=https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/examples/pattern_tradeoff.ipynb)|[![Open In Kaggle](https://kaggle.com/static/images/open-in-kaggle.svg)](https://kaggle.com/kernels/welcome?src=https://github.com/ampl/colab.ampl.com/blob/master/authors/fdabrandao/examples/pattern_tradeoff.ipynb)|[![Open In Gradient](https://assets.paperspace.io/img/gradient-badge.svg)](https://console.paperspace.com/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/examples/pattern_tradeoff.ipynb)|[![Open In SageMaker Studio Lab](https://studiolab.sagemaker.aws/studiolab.svg)](https://studiolab.sagemaker.aws/import/github/ampl/colab.ampl.com/blob/master/authors/fdabrandao/examples/pattern_tradeoff.ipynb)|