Fixing dead link in ChatGPT Azure RAG cookbook (#1327)

Co-authored-by: Aaron Wilkowitz <157151487+aaronwilkowitz-openai@users.noreply.github.com>

examples/chatgpt/rag-quickstart/azure/Azure_AI_Search_with_Azure_Functions_and_GPT_Actions_in_ChatGPT.ipynb

@@ -1035,7 +1035,7 @@
                 "### Create OpenAPI Spec\n",
                 "Below is a sample OpenAPI spec. When we run the block below, a functional spec should be copied to the clipboard to paste in the GPT Action.\n",
                 "\n",
-                "Note that this does not have any authentication by default, but you can set up Azure Functions with OAuth by following the pattern in [this cookbook](https://cookbook.openai.com/examples/chatgpt/sharepoint_azure_function/using_azure_functions_and_microsoft_graph_to_query_sharepoint) in the Authentication section or looking at the documentation [here](https://learn.microsoft.com/en-us/azure/app-service/overview-authentication-authorization)."
+                "Note that this does not have any authentication by default, but you can set up Azure Functions with OAuth by following the pattern in [this cookbook](https://cookbook.openai.com/examples/chatgpt/gpt_actions_library/gpt_middleware_azure_function#part-2-set-up-auth) in the Authentication section or looking at the documentation [here](https://learn.microsoft.com/en-us/azure/app-service/overview-authentication-authorization)."
             ]
         },
         {