Updates logos and readme

Author: Abhijnan03

README.md

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 # Surrogate Methods Jupyter Book
-This repository contains source code for a Jupyter Book outlining concepts and algorithms related to surrogate modeling and surrogate-based optimization. This book is created by the Computational Design (CODE) Laboratory led by Prof. Leifur Leifsson at Purdue University. The book can be accessed [here](https://computationaldesignlab.github.io/surrogate-methods/).
+This repository contains source code for a Jupyter Book outlining concepts and algorithms related to surrogate modeling and surrogate-based optimization. This book was created by the Computational Design (CODE) Laboratory led by Prof. Leifur Leifsson at Purdue University. The book can be accessed [here](https://computationaldesignlab.github.io/surrogate-methods/).

books/index.md

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 # Introduction
 This jupyter-book provides python implementation for various concepts and algorithms related to **Surrogate Methods**. The jupyter-book has been created by the **Computational Design (CODE) Laboratory** led by **Prof. Leifur Leifsson** at **Purdue University**. This jupyter-book is intended to be used as a starting point for new users of surrogate methods to implement the concepts and algorithms for their own work. The creation of this jupyter-book is funded partly by the National Science Foundation (NSF) award number 2223732. 
 
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 ![logos](images/logos.png) 
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