Bump pygments from 2.14.0 to 2.15.0

Bumps [pygments](https://github.com/pygments/pygments) from 2.14.0 to 2.15.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](https://github.com/pygments/pygments/compare/2.14.0...2.15.0)

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

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

requirements.txt

@@ -4,7 +4,7 @@ flask-babel==3.0.1
 flask==2.2.3
 jinja2==3.1.2
 lxml==4.9.2
-pygments==2.14.0
+pygments==2.15.0
 python-dateutil==2.8.2
 pyyaml==6.0
 httpx[http2]==0.21.2