chore(deps): update dependency sphinx-intl to v2.3.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sphinx-intl	==2.2.0 -> ==2.3.1

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Release Notes

sphinx-doc/sphinx-intl (sphinx-intl)

v2.3.1

Compare Source

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Environments

• Add missing files under sphinx-intl/tests/ for sdist by @​shimizukawa in https://github.com/sphinx-doc/sphinx-intl/pull/113

Incompatibility

Features

Bug Fixes

Documentation

Internals

v2.3.0

Compare Source

==================

Environments

• Drop python-3.7 support by @​kloczek in https://github.com/sphinx-doc/sphinx-intl/pull/101
• Drop Python-3.8 support by @​shimizukawa in https://github.com/sphinx-doc/sphinx-intl/pull/111
• Avoid unrelated CI test for doc changes, and cache using setup-python action by @​rffontenelle in https://github.com/sphinx-doc/sphinx-intl/pull/106

Incompatibility

Features

• Perform update in parallel by @​rtobar in https://github.com/sphinx-doc/sphinx-intl/pull/110

Bug Fixes

Documentation

Internals

• Modernize release procedures by @​shimizukawa in https://github.com/sphinx-doc/sphinx-intl/pull/102
• Modernize formatter: use ruff instead of flake8 by @​shimizukawa in https://github.com/sphinx-doc/sphinx-intl/pull/103
• add devcontainer and related dependabot config by @​shimizukawa in https://github.com/sphinx-doc/sphinx-intl/pull/104
• Add CI test for sphinx-intl's doc by @​rffontenelle in https://github.com/sphinx-doc/sphinx-intl/pull/107
• fix for lint by @​shimizukawa in https://github.com/sphinx-doc/sphinx-intl/pull/108

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