Bump pygments from 2.20.0 to 2.21.0

Bumps [pygments](https://github.com/pygments/pygments) from 2.20.0 to 2.21.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.20.0...2.21.0)

---
updated-dependencies:
- dependency-name: pygments
  dependency-version: 2.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

dependencies/constraints-ci.txt

@@ -81,7 +81,7 @@ pycairo==1.29.0
 pycparser==3.0
 pydantic==2.13.4
 pydantic_core==2.46.4
-Pygments==2.20.0
+Pygments==2.21.0
 PyJWT==2.13.0
 pytest==9.1.1
 pytest-cov==7.1.0