Bump pygments from 2.13.0 to 2.15.0

Bumps [pygments](https://github.com/pygments/pygments) from 2.13.0 to 2.15.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.13.0...2.15.0)

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

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

requirements.txt

@@ -69,7 +69,7 @@ pyfaidx==0.7.1
 pyfnutils==1.3
 pygit2==1.11.1
 PyGithub==1.57
-Pygments==2.13.0
+Pygments==2.15.0
 PyJWT==2.6.0
 PyNaCl==1.5.0
 pyparsing==3.0.9