Bump the llvm-docs-requirements group in /llvm/docs with 4 updates

Bumps the llvm-docs-requirements group in /llvm/docs with 4 updates: [charset-normalizer](https://github.com/jawah/charset_normalizer), [imagesize](https://github.com/shibukawa/imagesize_py), [pygments](https://github.com/pygments/pygments) and [requests](https://github.com/psf/requests).


Updates `charset-normalizer` from 3.4.4 to 3.4.6
- [Release notes](https://github.com/jawah/charset_normalizer/releases)
- [Changelog](https://github.com/jawah/charset_normalizer/blob/master/CHANGELOG.md)
- [Commits](jawah/charset_normalizer@3.4.4...3.4.6)

Updates `imagesize` from 1.4.1 to 2.0.0
- [Commits](shibukawa/imagesize_py@1.4.1...2.0.0)

Updates `pygments` from 2.19.2 to 2.20.0
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.19.2...2.20.0)

Updates `requests` from 2.32.5 to 2.33.1
- [Release notes](https://github.com/psf/requests/releases)
- [Changelog](https://github.com/psf/requests/blob/main/HISTORY.md)
- [Commits](psf/requests@v2.32.5...v2.33.1)

---
updated-dependencies:
- dependency-name: charset-normalizer
  dependency-version: 3.4.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: llvm-docs-requirements
- dependency-name: imagesize
  dependency-version: 2.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: llvm-docs-requirements
- dependency-name: pygments
  dependency-version: 2.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: llvm-docs-requirements
- dependency-name: requests
  dependency-version: 2.33.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: llvm-docs-requirements
...

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Author: dependabot[bot]