Replace GUID value with approved fictious value

Author: craigshoemaker

articles/container-apps/managed-identity.md

@@ -320,9 +320,8 @@ Content-Type: application/json
     "expires_on": "1586984735",
     "resource": "https://vault.azure.net",
     "token_type": "Bearer",
-    "client_id": "5E29463D-71DA-4FE0-8E69-999B57DB23B0"
+    "client_id": "aaaaaaaaa-0000-1111-2222-bbbbbbbbbbbb"
 }
-
 ```
 
 This response is the same as the [response for the Microsoft Entra service-to-service access token request](../active-directory/develop/v2-oauth2-client-creds-grant-flow.md#successful-response). To access Key Vault, add the value of `access_token` to a client connection with the vault.