build(deps): bump pygments from 2.18.0 to 2.19.1

Bumps [pygments](https://github.com/pygments/pygments) from 2.18.0 to 2.19.1.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.18.0...2.19.1)

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

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

requirements.txt

@@ -38,7 +38,7 @@ pydantic==2.10.1
 # but dependabot updates these separately (which is broken) and is annoying,
 # so we rely on pydantic to pull in the right version of pydantic-core.
 # pydantic-core==2.23.4
-pygments==2.18.0
+pygments==2.19.1
 pytest==8.3.3
 pytest-cov==6.0.0
 pytest-instafail==0.5.0