Update index.yml

corrected a typo.

Author: akbr2

articles/ai-studio/index.yml

@@ -42,7 +42,7 @@ landingContent:
     linkLists:   
       - linkListType: quickstart
         links:
-          - text: Build a chap app in the playground
+          - text: Build a chat app in the playground
             url: quickstarts/get-started-playground.md
           - text: Build a chat app using the Azure AI SDK
             url: quickstarts/get-started-code.md
@@ -94,4 +94,4 @@ landingContent:
           - text: Azure Machine Learning
             url: /azure/machine-learning/
           - text: Semantic Kernel
-            url: /semantic-kernel/
+            url: /semantic-kernel/