build(deps): bump pygments from 2.17.0 to 2.20.0 in /docs

Bumps [pygments](https://github.com/pygments/pygments) from 2.17.0 to 2.20.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.17.0...2.20.0)

---
updated-dependencies:
- dependency-name: pygments
  dependency-version: 2.20.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

docs/requirements.txt

@@ -2,4 +2,4 @@ sphinx==7.4.7
 sphinx_rtd_theme==2.0.0
 myst-parser==4.0.0
 sphinx-markdown-tables==0.0.17
-Pygments==2.17.0
+Pygments==2.20.0