fix: Fix enumeration properties on expression names

Author: pawamoy

src/griffe/expressions.py

@@ -619,7 +619,7 @@ def resolved(self) -> Module | Class | None:
     def is_enum_class(self) -> bool:
         """Whether this name resolves to an enumeration class."""
         try:
-            bases = self.parent[self.name].bases  # type: ignore[union-attr,index]
+            bases = self.resolved.bases  # type: ignore[union-attr]
         except Exception:  # noqa: BLE001
             return False