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 ba06a70c822ede62688136add488eb78957689fe)

Co-authored-by: Saiyang Gou <gousaiyang@163.com>
1 file changed