fix __match_args__ attribute name (#10813)

Author: bzoracler

stdlib/_ast.pyi

@@ -602,7 +602,7 @@ if sys.version_info >= (3, 12):
         name: _Identifier
 
     class TypeAlias(stmt):
-        __match_args__ = ("name", "typeparams", "value")
+        __match_args__ = ("name", "type_params", "value")
         name: Name
         type_params: list[type_param]
         value: expr