build(deps): bump chardet in /docs in the production-dependencies group (#4563)

Bumps the production-dependencies group in /docs with 1 update: [chardet](https://github.com/chardet/chardet).


Updates `chardet` from 7.5.1 to 7.6.0
- [Release notes](https://github.com/chardet/chardet/releases)
- [Changelog](https://github.com/chardet/chardet/blob/main/docs/changelog.rst)
- [Commits](chardet/chardet@7.5.1...7.6.0)

---
updated-dependencies:
- dependency-name: chardet
  dependency-version: 7.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production-dependencies
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -4,7 +4,7 @@ MarkupSafe==3.0.3
 Pygments==2.20.0
 Sphinx==8.2.3
 certifi==2026.7.22
-chardet==7.5.1
+chardet==7.6.0
 commonmark==0.9.2
 docutils==0.20.1
 idna==3.18