[python-dateutil]: add missing annotation to 'tag' in rebuild.py

Author: lev-blit

stubs/python-dateutil/dateutil/zoneinfo/rebuild.pyi

@@ -1,8 +1,12 @@
-from _typeshed import StrOrBytesPath
+from _typeshed import StrOrBytesPath, Unused
 from collections.abc import Iterable
 
 from ..zoneinfo import _MetadataType
 
 def rebuild(
-    filename: StrOrBytesPath, tag=None, format: str = "gz", zonegroups: Iterable[str] = [], metadata: _MetadataType | None = None
+    filename: StrOrBytesPath,
+    tag: Unused | None = None,
+    format: str = "gz",
+    zonegroups: Iterable[str] = [],
+    metadata: _MetadataType | None = None,
 ) -> None: ...