refresh update

Author: mrm9084

examples/Python/ChatApp/README.md

@@ -36,6 +36,8 @@ This sample demonstrates using Azure App Configuration to configure Azure OpenAI
      - temperature - Temperature parameter (e.g., 0.7)
      - top_p - Top p parameter (e.g., 0.95)
      - messages - An array of messages with role and content for each message
+   ChatApp:Sentinel - A sentinel key to trigger configuration refreshes
+   ```
 
    Example JSON object for ChatApp:Model:
    ```json

examples/Python/ChatApp/app.py

@@ -43,7 +43,7 @@ def main():
         credential=CREDENTIAL,
         keyvault_credential=CREDENTIAL,
         trim_prefixes=[CHAT_APP_KEY],
-        refresh_on=[WatchKey(key=f"{CHAT_APP_KEY}{CHAT_COMPLETION_KEY}")],
+        refresh_on=[WatchKey(key=f"{CHAT_APP_KEY}Sentinel")],
         on_refresh_success=configure_app,
     )
     configure_app()