Bump pygments from 2.17.2 to 2.18.0 in /docs

Bumps [pygments](https://github.com/pygments/pygments) from 2.17.2 to 2.18.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.17.2...2.18.0)

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

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

docs/requirements.txt

@@ -25,7 +25,7 @@ packaging==24.0
 paginate==0.5.6
 pathspec==0.12.1
 platformdirs==4.2.0
-Pygments==2.17.2
+Pygments==2.18.0
 pymdown-extensions==10.8
 python-dateutil==2.9.0.post0
 PyYAML==6.0.1