Updated pr_tutorial.md

Author: vpavankalyan

docs/source/contributing/pr_tutorial.md

@@ -25,7 +25,17 @@ The preferred workflow for contributing to PyMC is to fork the [GitHub repositor
    :::
 
 4. Project requirements are in ``requirements.txt``, and libraries used for development are in ``requirements-dev.txt``. The easiest (and recommended) way to set up a development environment is via [miniconda](https://docs.conda.io/en/latest/miniconda.html):
+   
+   If using Windows:
 
+   ```bash
+   conda env create -f .\conda-envs\windows-environment-dev-py38.yml
+   conda activate pymc-dev-py38
+   pip install -e .
+   ```
+
+   For other platforms:
+   
    ```bash
    $ conda env create -f conda-envs/environment-dev-py37.yml  # or py38 or py39
    $ conda activate pymc-dev-py37