Build(deps): Bump pygments from 2.18.0 to 2.19.1 in /dependencies/docs

Bumps [pygments](https://github.com/pygments/pygments) from 2.18.0 to 2.19.1.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.18.0...2.19.1)

---
updated-dependencies:
- dependency-name: pygments
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

dependencies/docs/constraints.txt

@@ -8,7 +8,7 @@ imagesize==1.4.1
 Jinja2==3.1.5
 MarkupSafe==3.0.2
 packaging==24.2
-Pygments==2.18.0
+Pygments==2.19.1
 requests==2.32.3
 snowballstemmer==2.2.0
 Sphinx==8.0.2