chore(deps-dev): bump sphinxcontrib-bibtex from 2.6.3 to 2.6.5

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Bumps sphinxcontrib-bibtex from 2.6.3 to 2.6.5.

Changelog

Sourced from sphinxcontrib-bibtex's changelog.

2.6.5 (27 June 2025)

• Require pybtex 0.25 and remove setuptools dependency hack (fixed by flying-sheep, see pull request #372).

2.6.4 (17 June 2025)

• Add Python 3.13 support.

• Add setuptools as dependency on all Python versions. This fixes an issue with an undeclared setuptools dependency in the latest release of pybtex. See discussion in issue #345.

• Python 3.7 and 3.8 are EOL and are therefore no longer officially supported.

• FootCiteRole now derives from SphinxRole instead of XRefRole, simplifying the implementation.

• Bib files in conf.py are now resolved relative to confdir instead of srcdir (reported and fixed by rgambord, see issue #357 and pull request #358).

• Duplicate label warnings are no longer issued if the non-prefixed keys are identical. This allows having duplicate citations, as long as the keys are differently prefixed, which is a common use case. See issue #365 reported by ego-thales.

Commits

• 97c63a4 Prepare release. (#373)
• 49f4d57 Remove pybtex’ transitive dependency hack (#372)
• f1abb2a Version bump. [skip ci]
• b59659e Prepare release 2.6.4 (#371)
• 642353e Document how to remove backrefs with whitespace (closes #364 again) (#368)
• a455b0e Fix doc reference. [skip ci]
• e543128 Doc fixes. [skip ci]
• d18485e Fix. [skip ci]
• 7c176ad Document how to remove backrefs (closes #364).
• 60e6038 Update docs since label prefix no longer needed for duplicate citations if ke...
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