Bump pygments from 2.18.0 to 2.20.0

Bumps [pygments](https://github.com/pygments/pygments) from 2.18.0 to 2.20.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.18.0...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]

requirements_test.txt

@@ -7,7 +7,7 @@ pytest-cov==7.0.0
 pytest-sugar==1.1.1
 pytest-timeout==2.4.0
 restructuredtext-lint==2.0.2
-pygments==2.18.0
+pygments==2.20.0
 testtools>=2.4.0
 sortedcontainers~=2.4.0
 pytest-asyncio>=0.21.0