fix: remove | syntax

Author: o-santi

src/functions/src/supabase_functions/client.py

@@ -124,7 +124,7 @@ def _invoke_options_to_request(
     @http_endpoint
     def invoke(
         self, function_name: str, invoke_options: Optional[Dict] = None
-    ) -> ServerEndpoint[Union[JSON, bytes], FunctionsHttpError | FunctionsRelayError]:
+    ) -> ServerEndpoint[Union[JSON, bytes], Union[FunctionsHttpError, FunctionsRelayError]]:
         """Invokes a function
 
         Parameters