[configparser] Narrow RawConfigParser.values() to SectionProxy (#16238)

Author: advitrocks9

stdlib/configparser.pyi

@@ -1,6 +1,6 @@
 import sys
 from _typeshed import BytesPath, GenericPath, MaybeNone, StrOrBytesPath, StrPath, SupportsWrite
-from collections.abc import Callable, ItemsView, Iterable, Iterator, Mapping, MutableMapping, Sequence
+from collections.abc import Callable, ItemsView, Iterable, Iterator, Mapping, MutableMapping, Sequence, ValuesView
 from re import Pattern
 from typing import Any, AnyStr, ClassVar, Final, Literal, TypeAlias, TypeVar, overload, type_check_only
 from typing_extensions import deprecated
@@ -333,6 +333,7 @@ class RawConfigParser(_Parser):
     @overload
     def items(self, section: _SectionName, raw: bool = False, vars: _Section | None = None) -> list[tuple[str, str]]: ...
 
+    def values(self) -> ValuesView[SectionProxy]: ...
     def set(self, section: _SectionName, option: str, value: str | None = None) -> None: ...
     def write(self, fp: SupportsWrite[str], space_around_delimiters: bool = True) -> None: ...
     def remove_option(self, section: _SectionName, option: str) -> bool: ...