Fix typo in "Context manager types" section in typing.rst (GH-22676)

Fix typo in the "Context manager types" section in `typing.rst`.

Automerge-Triggered-By: @gvanrossum
(cherry picked from commit ba06a70)

Co-authored-by: Saiyang Gou <[email protected]>

Author: miss-islington

Doc/library/typing.rst

@@ -1461,7 +1461,7 @@ Context manager types
    .. versionadded:: 3.6.0
 
    .. deprecated:: 3.9
-      :class:`collections.contextlib.AbstractContextManager` now supports ``[]``. See :pep:`585`.
+      :class:`contextlib.AbstractContextManager` now supports ``[]``. See :pep:`585`.
 
 .. class:: AsyncContextManager(Generic[T_co])
 
@@ -1471,7 +1471,7 @@ Context manager types
    .. versionadded:: 3.6.2
 
    .. deprecated:: 3.9
-      :class:`collections.contextlib.AbstractAsyncContextManager` now supports ``[]``. See :pep:`585`.
+      :class:`contextlib.AbstractAsyncContextManager` now supports ``[]``. See :pep:`585`.
 
 Protocols
 ---------