[doc] Use list[int] instead of List[int] (etc.) in a few more places (pythonGH-22524)

This changes a few occurrences left behind by pythonGH-22340.

Automerge-Triggered-By: @gvanrossum
(cherry picked from commit 7f54e56)

Co-authored-by: Andre Delfino <adelfino@gmail.com>

Author: andresdelfino

Doc/library/dataclasses.rst

@@ -188,7 +188,7 @@ Module-level decorators, classes, and functions
 
      @dataclass
      class C:
-         mylist: List[int] = field(default_factory=list)
+         mylist: list[int] = field(default_factory=list)
 
      c = C()
      c.mylist += [1, 2, 3]
@@ -301,7 +301,7 @@ Module-level decorators, classes, and functions
 
      @dataclass
      class C:
-          mylist: List[Point]
+          mylist: list[Point]
 
      p = Point(10, 20)
      assert asdict(p) == {'x': 10, 'y': 20}

Doc/library/typing.rst

@@ -661,7 +661,7 @@ These can be used as types in annotations using ``[]``, each having a unique syn
    and should not be set on instances of that class. Usage::
 
       class Starship:
-          stats: ClassVar[Dict[str, int]] = {} # class variable
+          stats: ClassVar[dict[str, int]] = {} # class variable
           damage: int = 10                     # instance variable
 
    :data:`ClassVar` accepts only types and cannot be further subscribed.
@@ -774,10 +774,10 @@ These can be used as types in annotations using ``[]``, each having a unique syn
    * ``Annotated`` can be used with nested and generic aliases::
 
        T = TypeVar('T')
-       Vec = Annotated[List[Tuple[T, T]], MaxLen(10)]
+       Vec = Annotated[list[tuple[T, T]], MaxLen(10)]
        V = Vec[int]
 
-       V == Annotated[List[Tuple[int, int]], MaxLen(10)]
+       V == Annotated[list[tuple[int, int]], MaxLen(10)]
 
    .. versionadded:: 3.9
 
@@ -1540,7 +1540,7 @@ Functions and decorators
       def process(response: None) -> None:
           ...
       @overload
-      def process(response: int) -> Tuple[int, str]:
+      def process(response: int) -> tuple[int, str]:
           ...
       @overload
       def process(response: bytes) -> str:
@@ -1664,8 +1664,8 @@ Introspection helpers
 .. class:: ForwardRef
 
    A class used for internal typing representation of string forward references.
-   For example, ``List["SomeClass"]`` is implicitly transformed into
-   ``List[ForwardRef("SomeClass")]``.  This class should not be instantiated by
+   For example, ``list["SomeClass"]`` is implicitly transformed into
+   ``list[ForwardRef("SomeClass")]``.  This class should not be instantiated by
    a user, but may be used by introspection tools.
 
 Constant