Git services: check for 403 status code (#12444)

ref
https://read-the-docs.sentry.io/issues/6837961607/?alert_rule_id=229005&alert_timestamp=1756241038110&alert_type=email&environment=production&notification_uuid=257d21bb-47d7-4fb3-9057-b7136b51998b&project=148442&referrer=alert_email

Author: stsewd

readthedocs/oauth/services/base.py

@@ -212,7 +212,7 @@ def paginate(self, url, **kwargs) -> Iterator[dict]:
             # ``create_session`` method since it could be used from outside, but
             # I didn't find a generic way to make a test request to each
             # provider.
-            if resp.status_code == 401:
+            if resp.status_code in [401, 403]:
                 # Bad credentials: the token we have in our database is not
                 # valid. Probably the user has revoked the access to our App. He
                 # needs to reconnect his account