Bump the llvm-docs-requirements group in /llvm/docs with 7 updates

Bumps the llvm-docs-requirements group in /llvm/docs with 7 updates:

| Package | From | To |
| --- | --- | --- |
| [sphinx](https://github.com/sphinx-doc/sphinx) | `8.1.3` | `8.2.3` |
| [myst-parser](https://github.com/executablebooks/MyST-Parser) | `4.0.0` | `4.0.1` |
| [certifi](https://github.com/certifi/python-certifi) | `2025.8.3` | `2025.10.5` |
| [charset-normalizer](https://github.com/jawah/charset_normalizer) | `3.4.3` | `3.4.4` |
| [idna](https://github.com/kjd/idna) | `3.10` | `3.11` |
| [markdown-it-py](https://github.com/executablebooks/markdown-it-py) | `3.0.0` | `4.0.0` |
| [mdit-py-plugins](https://github.com/executablebooks/mdit-py-plugins) | `0.4.2` | `0.5.0` |


Updates `sphinx` from 8.1.3 to 8.2.3
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v8.1.3...v8.2.3)

Updates `myst-parser` from 4.0.0 to 4.0.1
- [Release notes](https://github.com/executablebooks/MyST-Parser/releases)
- [Changelog](https://github.com/executablebooks/MyST-Parser/blob/master/CHANGELOG.md)
- [Commits](executablebooks/MyST-Parser@v4.0.0...v4.0.1)

Updates `certifi` from 2025.8.3 to 2025.10.5
- [Commits](certifi/python-certifi@2025.08.03...2025.10.05)

Updates `charset-normalizer` from 3.4.3 to 3.4.4
- [Release notes](https://github.com/jawah/charset_normalizer/releases)
- [Changelog](https://github.com/jawah/charset_normalizer/blob/master/CHANGELOG.md)
- [Commits](jawah/charset_normalizer@3.4.3...3.4.4)

Updates `idna` from 3.10 to 3.11
- [Release notes](https://github.com/kjd/idna/releases)
- [Changelog](https://github.com/kjd/idna/blob/master/HISTORY.rst)
- [Commits](kjd/idna@v3.10...v3.11)

Updates `markdown-it-py` from 3.0.0 to 4.0.0
- [Release notes](https://github.com/executablebooks/markdown-it-py/releases)
- [Changelog](https://github.com/executablebooks/markdown-it-py/blob/master/CHANGELOG.md)
- [Commits](executablebooks/markdown-it-py@v3.0.0...v4.0.0)

Updates `mdit-py-plugins` from 0.4.2 to 0.5.0
- [Release notes](https://github.com/executablebooks/mdit-py-plugins/releases)
- [Changelog](https://github.com/executablebooks/mdit-py-plugins/blob/master/CHANGELOG.md)
- [Commits](executablebooks/mdit-py-plugins@v0.4.2...v0.5.0)

---
updated-dependencies:
- dependency-name: sphinx
  dependency-version: 8.2.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: llvm-docs-requirements
- dependency-name: myst-parser
  dependency-version: 4.0.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: llvm-docs-requirements
- dependency-name: certifi
  dependency-version: 2025.10.5
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: llvm-docs-requirements
- dependency-name: charset-normalizer
  dependency-version: 3.4.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: llvm-docs-requirements
- dependency-name: idna
  dependency-version: '3.11'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: llvm-docs-requirements
- dependency-name: markdown-it-py
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: llvm-docs-requirements
- dependency-name: mdit-py-plugins
  dependency-version: 0.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: llvm-docs-requirements
...

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Author: dependabot[bot]