fix: omit error-check for 201 responses in async_call_api

Skip error-checking for responses with a 201 status code in async_call_api, preventing false error raises for successful REST operations.

aiogithubapi/client.py

@@ -185,7 +185,9 @@ async def async_call_api(
             if message is not None:
                 if exception := MESSAGE_EXCEPTIONS.get(message):
                     raise exception(message)
-                raise GitHubException(message)
+                # For a 201 Created response, we assume the operation was successful and ignore any "message" field.
+                if not response.status == HttpStatusCode.CREATED:
+                    raise GitHubException(message)
 
         if endpoint == "/graphql" and response.data.get("errors", []):
             raise GitHubGraphQLException(