Use typing_extensions.Self instead of _typeshed.Self (#9702)

stubs/parsimonious/parsimonious/expressions.pyi

@@ -1,9 +1,8 @@
 import collections.abc
-from _typeshed import Self
 from collections.abc import Callable, Mapping
 from re import Pattern
 from typing import Any
-from typing_extensions import TypeAlias
+from typing_extensions import Self, TypeAlias
 
 from parsimonious.exceptions import ParseError
 from parsimonious.grammar import Grammar
@@ -25,7 +24,7 @@ class Expression(StrAndRepr):
     name: str
     identity_tuple: tuple[str]
     def __init__(self, name: str = ...) -> None: ...
-    def resolve_refs(self: Self, rule_map: Mapping[str, Expression]) -> Self: ...
+    def resolve_refs(self, rule_map: Mapping[str, Expression]) -> Self: ...
     def parse(self, text: str, pos: int = ...) -> Node: ...
     def match(self, text: str, pos: int = ...) -> Node: ...
     def match_core(self, text: str, pos: int, cache: Mapping[tuple[int, int], Node], error: ParseError) -> Node: ...