Added AOAI access request link to CS hub page & AOAI landing page

Author: DenKenMSFT

articles/cognitive-services/index.yml

@@ -108,17 +108,20 @@ conceptualContent:
           itemType: overview
           text:  Azure OpenAI (Preview)
         - url: ./openai/concepts/models.md
-          itemType: overview
+          itemType: concept
           text: Azure OpenAI Models
         - url: ./openai/quickstart.md
-          itemType: overview
+          itemType: get-started
           text: Get started generating text using Azure OpenAI
         - url: ./openai/how-to/embeddings.md
-          itemType: overview
+          itemType: how-to-guide
           text: Generate embeddings with Azure OpenAI
         - url: ./openai/how-to/fine-tuning.md
-          itemType: overview
+          itemType: how-to-guide
           text: Customize a model for your application
+        - url: https://aka.ms/oaiapply
+          itemType: get-started
+          text: Apply for access to Azure OpenAI
     - title: Cognitive Service Containers
       summary: Container support in Azure Cognitive Services allows developers to use the same rich APIs that are available in Azure, and enables flexibility in where to deploy and host the services that come with Docker containers.
       links:

articles/cognitive-services/openai/index.yml

@@ -55,6 +55,8 @@ additionalContent:
             # Card
             - text: Quotas and limits
               url: /azure/cognitive-services/openai/quotas-limits?branch=release-azure-openai-preview
+            - text: Apply for access to Azure OpenAI
+              url: https://aka.ms/oaiapply
         - title: Video
           links:
             - text: Combining OpenAI models with the power of Azure