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

@@ -10,7 +10,7 @@ djangorestframework==3.14.0
 httptools==0.5.0
 idna==3.4
 multidict==6.0.3
-Pygments==2.13.0
+Pygments==2.15.0
 python-dateutil==2.8.2
 pytz==2022.7
 pytz-deprecation-shim==0.1.0.post0