Bump pygments from 2.15.1 to 2.18.0

Bumps [pygments](https://github.com/pygments/pygments) from 2.15.1 to 2.18.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.15.1...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]>

mkdocs-requirements.txt

@@ -7,6 +7,6 @@ pymdown-extensions==10.0.1
 
 
 ## Requirements for 'pymdown-extensions'.
-Pygments==2.15.1
+Pygments==2.18.0
 requests>=2.32.0 # not directly required, pinned by Snyk to avoid a vulnerability
 zipp>=3.19.1 # not directly required, pinned by Snyk to avoid a vulnerability