GH-101100: Resolve reference warnings in whatsnew/3.10.rst

[AA-Turner]

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

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📚 Documentation preview 📚: https://cpython-previews--138408.org.readthedocs.build/

[AA-Turner]

@hugovk I think your merge commit restored the line in .nitignore!

[hugovk]

Oops :) Want to resolve the new conflict?

[AA-Turner]

It's really not my day... now resolved!

A

[miss-islington-app]

Thanks @AA-Turner for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14.
🐍🍒⛏🤖

[miss-islington-app]

Sorry, @AA-Turner, I could not cleanly backport this to 3.13 due to a conflict.
Please backport using cherry_picker on command line.

cherry_picker b94ee048f3008016faab38a1e45e473142497169 3.13 

[bedevere-app]

GH-138480 is a backport of this pull request to the 3.14 branch.

[miss-islington-app]

Thanks @AA-Turner for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13.
🐍🍒⛏🤖

[bedevere-app]

GH-138481 is a backport of this pull request to the 3.13 branch.

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Fedora Stable Refleaks 3.14 (tier-3) has failed when building commit 2583646.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1776/builds/395) and take a look at the build logs.
4. Check if the failure is related to this commit (2583646) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1776/builds/395

Failed tests:

• test_external_inspection
• test_os

Failed subtests:

• test_only_active_thread - test.test_external_inspection.TestGetStackTrace.test_only_active_thread
• test_timerfd_ns_poll - test.test_os.TimerfdTests.test_timerfd_ns_poll

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last): File "/home/buildbot/buildarea/3.14.cstratak-fedora-stable-s390x.refleak/build/Lib/test/test_external_inspection.py", line 1246, in test_only_active_threadself.assertEqual( ~~~~~~~~~~~~~~~~^len(gil_traces), 1, "Should have exactly one GIL holder"^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ) ^AssertionError: 0 != 1 : Should have exactly one GIL holder Traceback (most recent call last): File "/home/buildbot/buildarea/3.14.cstratak-fedora-stable-s390x.refleak/build/Lib/test/test_os.py", line 4508, in test_timerfd_ns_pollself.check_timerfd_poll(True) ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^ File "/home/buildbot/buildarea/3.14.cstratak-fedora-stable-s390x.refleak/build/Lib/test/test_os.py", line 4493, in check_timerfd_pollself.assertEqual(self.read_count_signaled(fd), 1) ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^AssertionError: 2 != 1