PEP 594: add myself as co-author and target for Python 3.11 (#2262)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Co-authored-by: CAM Gerlach <CAM.Gerlach@Gerlach.CAM>

Author: 3 people

.github/CODEOWNERS

@@ -458,7 +458,7 @@ pep-0590.rst  @markshannon
 pep-0591.rst  @ilevkivskyi
 pep-0592.rst  @dstufft
 pep-0593.rst  @ilevkivskyi
-pep-0594.rst  @tiran
+pep-0594.rst  @tiran @brettcannon
 pep-0595.rst  @ezio-melotti @berkerpeksag
 pep-0596.rst  @ambv
 pep-0597.rst  @methane