Update README.md

updating links

Author: kathyz95

Classroom Challenge Projects/README.md

@@ -53,7 +53,7 @@ Instructors are encouraged to review and share these [guidelines](https://github
 If students are interested in taking advantage of generative AI tools to help get started on their projects, MathWorks offers a growing set of generative AI resources that help new users work faster and more intuitively with MATLAB:
 
 1.	[MATLAB Copilot](https://www.mathworks.com/videos/get-started-with-matlab-copilot-1770876168113.html) is your AI assistant for writing, understanding, and debugging MATLAB code directly within the MATLAB environment. It assists with MATLAB workflows and provides responses based on information specific to MATLAB. MATLAB Copilot is included in many academic licenses. If your institution offers campus-wide MATLAB access, you and your students may already have access to MATLAB Copilot. See the MATLAB access guidelines above.  
-2.	[MATLAB GPT](https://chatgpt.com/g/g-QFTjbeK3U-matlab), available in OpenAI, searches [MathWorks web pages](mathworks.com) to answer questions about MATLAB workflows. As an AI-powered conversational assistant, MATLAB GPT provides contextual guidance, enables you to quickly discover resources and stay up to the date with the latest features, and generates MATLAB code directly from plain-language descriptions. 
+2.	[MATLAB GPT](https://chatgpt.com/g/g-QFTjbeK3U-matlab), available in OpenAI, searches [MathWorks web pages](https://www.mathworks.com/) to answer questions about MATLAB workflows. As an AI-powered conversational assistant, MATLAB GPT provides contextual guidance, enables you to quickly discover resources and stay up to the date with the latest features, and generates MATLAB code directly from plain-language descriptions. 
 3.	The [MATLAB AI Chat Playground](https://www.mathworks.com/matlabcentral/playground/new) is built on OpenAI and optimized to assist with MATLAB related questions. The AI Chat Playground is actively improved based on user feedback. All input and output are focused on subject areas related to technical computing, science, engineering, MATLAB, and other MathWorks products. The AI Chat Playground: Learning Mode is an interactive personalized AI tutor that helps you build deeper understanding rather than just providing solutions. It provides guidance with hints, questions, and step-by-step reasoning, adapting to your skill level with continued used. AI Chat Playground: Learning Mode is currently in a testing phase. If you’d like to try it out and participate in the testing round, please [contact us](https://www.mathworks.com/academia/student-challenge/mathworks-excellence-in-innovation-contact-us.html) and specify your inquiry.
 
 ## Instructions for Nominated Project Solution Submissions 📋