[3.12] gh-101100: Fix Sphinx warnings in Doc/using/configure.rst (GH-109931)

[miss-islington]

(cherry picked from commit 3538930)

Co-authored-by: Victor Stinner [email protected]

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

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📚 Documentation preview 📚: https://cpython-previews--109937.org.readthedocs.build/

[vstinner]

LGTM, good bot.

[erlend-aasland]

This breaks the Docs CI:

Error: must not contain warnings:

Doc/using/configure.rst
  772: c:macro reference target not found: PyAPI_FUNC()
  772: c:macro reference target not found: PyAPI_DATA()
  772: c:macro reference target not found: PyMODINIT_FUNC
Error: Process completed with exit code 255.

[vstinner]

This breaks the Docs CI:
772: c:macro reference target not found: PyAPI_FUNC()
772: c:macro reference target not found: PyAPI_DATA()
772: c:macro reference target not found: PyMODINIT_FUNC

Oh, I forgot to backport other Sphinx warnings fixed: PR #109236. I just created PR #109947 for Python 3.12: it should be merged before this PR.

[erlend-aasland]

Great, thanks!