Need to add France Central

Azure OpenAI Service is also available in France Central region as per https://learn.microsoft.com/en-us/azure/cognitive-services/openai/concepts/models

Author: nkgami

articles/cognitive-services/openai/overview.md

@@ -28,7 +28,7 @@ Azure OpenAI Service provides REST API access to OpenAI's powerful language mode
 | Virtual network support & private link support | Yes | 
 | Managed Identity| Yes, via Azure Active Directory | 
 | UI experience | **Azure Portal** for account & resource management, <br> **Azure OpenAI Service Studio** for model exploration and fine tuning |
-| Regional availability | East US <br> South Central US <br> West Europe |
+| Regional availability | East US <br> South Central US <br> West Europe <br> France Central |
 | Content filtering | Prompts and completions are evaluated against our content policy with automated systems. High severity content will be filtered. |
 
 ## Responsible AI