⬆️(backend) bump pygments from 2.19.2 to 2.20.0 in /src/backend

Bumps [pygments](https://github.com/pygments/pygments) from 2.19.2 to 2.20.0.
- [Release notes](https://github.com/pygments/pygments/releases)
- [Changelog](https://github.com/pygments/pygments/blob/master/CHANGES)
- [Commits](pygments/pygments@2.19.2...2.20.0)

---
updated-dependencies:
- dependency-name: pygments
  dependency-version: 2.20.0
  dependency-type: indirect
...

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

Author: dependabot[bot]

CHANGELOG.md

@@ -18,6 +18,7 @@ and this project adheres to
 
 - ⬆️(backend) bump lodash from 4.17.23 to 4.18.1 in /src/mail
 - ⬆️(frontend) bump hono from 4.12.8 to 4.12.12 in /src/frontend
+- ⬆️(backend) bump pygments from 2.19.2 to 2.20.0 in /src/backend
 
 ### Fixed