[stdlib] Add missing Final (#14613)

stdlib/unittest/mock.pyi

@@ -52,7 +52,7 @@ else:
         "seal",
     )
 
-FILTER_DIR: Any
+FILTER_DIR: bool  # controls the way mock objects respond to `dir` function
 
 class _SentinelObject:
     name: Any
@@ -61,7 +61,7 @@ class _SentinelObject:
 class _Sentinel:
     def __getattr__(self, name: str) -> Any: ...
 
-sentinel: Any
+sentinel: _Sentinel
 DEFAULT: Any
 
 _ArgsKwargs: TypeAlias = tuple[tuple[Any, ...], Mapping[str, Any]]
@@ -428,7 +428,7 @@ class _ANY:
     def __ne__(self, other: object) -> Literal[False]: ...
     __hash__: ClassVar[None]  # type: ignore[assignment]
 
-ANY: Any
+ANY: _ANY
 
 if sys.version_info >= (3, 10):
     def create_autospec(