PEP 729: Typing governance process (#3455)

Co-authored-by: Shantanu <[email protected]>
Co-authored-by: Hugo van Kemenade <[email protected]>

Author: 3 people

.github/CODEOWNERS

@@ -606,6 +606,7 @@ peps/pep-0724.rst  @jellezijlstra
 peps/pep-0725.rst  @pradyunsg
 peps/pep-0726.rst  @AA-Turner
 peps/pep-0727.rst  @JelleZijlstra
+peps/pep-0729.rst  @JelleZijlstra @hauntsaninja
 # ...
 # peps/pep-0754.rst
 # ...