Update sphinx requirement from ~=5.3 to ~=7.1

[dependabot]

Updates the requirements on sphinx to permit the latest version.

Release notes

Sourced from sphinx's releases.

Sphinx 7.1.1

Changelog: https://www.sphinx-doc.org/en/master/changes.html

Changelog

Sourced from sphinx's changelog.

Release 7.1.1 (released Jul 27, 2023)

Bugs fixed

• #11514: Fix SOURCE_DATE_EPOCH in multi-line copyright footer. Patch by Bénédikt Tran.

Release 7.1.0 (released Jul 24, 2023)

Incompatible changes

• Releases are no longer signed, given the change in PyPI policy_.

  .. _change in PyPI policy: https://blog.pypi.org/posts/2023-05-23-removing-pgp/

Deprecated

• #11412: Emit warnings on using a deprecated Python-specific index entry type (namely, module, keyword, operator, object, exception, statement, and builtin) in the :rst:dir:index directive, and set the removal version to Sphinx 9. Patch by Adam Turner.

Features added

• #11415: Add a checksum to JavaScript and CSS asset URIs included within generated HTML, using the CRC32 algorithm.
• :meth:~sphinx.application.Sphinx.require_sphinx now allows the version requirement to be specified as (major, minor).
• #11011: Allow configuring a line-length limit for object signatures, via :confval:maximum_signature_line_length and the domain-specific variants. If the length of the signature (in characters) is greater than the configured limit, each parameter in the signature will be split to its own logical line. This behaviour may also be controlled by options on object description directives, for example :rst:dir:py:function:single-line-parameter-list. Patch by Thomas Louf, Adam Turner, and Jean-François B.
• #10983: Support for multiline copyright statements in the footer block. Patch by Stefanie Molin
• sphinx.util.display.status_iterator now clears the current line with ANSI control codes, rather than overprinting with space characters.
• #11431: linkcheck: Treat SSL failures as broken links. Patch by Bénédikt Tran
• #11157: Keep the translated attribute on translated nodes.
• #11451: Improve the traceback displayed when using :option:sphinx-build -T in parallel builds. Patch by Bénédikt Tran

... (truncated)

Commits

• d8d73c1 Bump to 7.1.1 final
• a54e630 [internationalisation] Update message catalogues
• 8452300 Fix multi-line copyright when SOURCE_DATE_EPOCH is set (#11524)
• fe08cec bump version
• e560f63 Bump to 7.1.0 final
• 066e0fa Add translation progress information (#11509)
• 0882914 Target PyPI in create-release.yml
• 21fbee5 Fix OIDC token payload
• 1a403e4 Add informational log messaging
• 258b0ea Revert "Switch to using github.request"
• Additional commits viewable in compare view

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[dependabot]

Superseded by #171.