fix: catch error that occurs when ghost user made a release. (#367)

* fix: catch error that occurs when ghost user made a release.

* erro message like the other similar situations

Author: 1ucian0

stale_repos.py

@@ -187,6 +187,12 @@ def get_days_since_last_release(repo):
     try:
         last_release = next(repo.releases())
         return (datetime.now(timezone.utc) - last_release.created_at).days
+    except TypeError:
+        print(
+            f"{repo.html_url} had an exception trying to get the last release.\
+            Potentially caused by ghost user."
+        )
+        return None
     except StopIteration:
         return None