gh-101100: Fix Sphinx warnings in whatsnew/2.2.rst

[hugovk]

Same rationale as #112351.

Fix 29 Sphinx warnings:

❯ SPHINXERRORHANDLING=-n PATH=./venv/bin:$PATH sphinx-build -b html -d build/doctrees -j auto -n . build/html whatsnew/2.1.rst 2>&1| grep 2.1.rst | tee >(wc -l)Doc/whatsnew/2.1.rst:51: WARNING: py:func reference target not found: gDoc/whatsnew/2.1.rst:105: WARNING: py:func reference target not found: gDoc/whatsnew/2.1.rst:162: WARNING: py:meth reference target not found: __cmp__Doc/whatsnew/2.1.rst:182: WARNING: py:meth reference target not found: __lt__Doc/whatsnew/2.1.rst:184: WARNING: py:meth reference target not found: __le__Doc/whatsnew/2.1.rst:186: WARNING: py:meth reference target not found: __gt__Doc/whatsnew/2.1.rst:188: WARNING: py:meth reference target not found: __ge__Doc/whatsnew/2.1.rst:190: WARNING: py:meth reference target not found: __eq__Doc/whatsnew/2.1.rst:192: WARNING: py:meth reference target not found: __ne__Doc/whatsnew/2.1.rst:207: WARNING: py:func reference target not found: cmpDoc/whatsnew/2.1.rst:248: WARNING: py:mod reference target not found: regexDoc/whatsnew/2.1.rst:263: WARNING: py:mod reference target not found: regexDoc/whatsnew/2.1.rst:275: WARNING: py:mod reference target not found: regexDoc/whatsnew/2.1.rst:368: WARNING: py:func reference target not found: fDoc/whatsnew/2.1.rst:382: WARNING: py:func reference target not found: memoizeDoc/whatsnew/2.1.rst:400: WARNING: py:exc reference target not found: weakref.ReferenceErrorDoc/whatsnew/2.1.rst:444: WARNING: py:class reference target not found: UserDictDoc/whatsnew/2.1.rst:586: WARNING: py:mod reference target not found: inspect.pyDoc/whatsnew/2.1.rst:586: WARNING: py:mod reference target not found: pydoc.pyDoc/whatsnew/2.1.rst:586: WARNING: py:mod reference target not found: pydoc.pyDoc/whatsnew/2.1.rst:619: WARNING: py:class reference target not found: SequenceMatcherDoc/whatsnew/2.1.rst:631: WARNING: py:mod reference target not found: minidomDoc/whatsnew/2.1.rst:645: WARNING: py:func reference target not found: asctimeDoc/whatsnew/2.1.rst:645: WARNING: py:func reference target not found: localtimeDoc/whatsnew/2.1.rst:725: WARNING: py:meth reference target not found: xreadlinesDoc/whatsnew/2.1.rst:725: WARNING: py:func reference target not found: xrangeDoc/whatsnew/2.1.rst:725: WARNING: py:func reference target not found: xreadlinesDoc/whatsnew/2.1.rst:725: WARNING: py:meth reference target not found: readlinesDoc/whatsnew/2.1.rst:739: WARNING: py:meth reference target not found: popitem 29

• Issue: Fix all Sphinx reference warnings in the documentation #101100

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📚 Documentation preview 📚: https://cpython-previews--112366.org.readthedocs.build/

[miss-islington-app]

Thanks @hugovk for the PR 🌮🎉.. I'm working now to backport this PR to: 3.11, 3.12.
🐍🍒⛏🤖

[bedevere-app]

GH-114711 is a backport of this pull request to the 3.12 branch.

[bedevere-app]

GH-114712 is a backport of this pull request to the 3.11 branch.