Add default value to ast.MatchStar.name (#14298)

Author: hunterhogan

stdlib/ast.pyi

@@ -1590,7 +1590,7 @@ if sys.version_info >= (3, 10):
     class MatchStar(pattern):
         __match_args__ = ("name",)
         name: str | None
-        def __init__(self, name: str | None, **kwargs: Unpack[_Attributes[int]]) -> None: ...
+        def __init__(self, name: str | None = None, **kwargs: Unpack[_Attributes[int]]) -> None: ...
 
         if sys.version_info >= (3, 14):
             def __replace__(self, *, name: str | None = ..., **kwargs: Unpack[_Attributes[int]]) -> Self: ...