Deps: Bump pontos from 23.7.6 to 23.7.7 in /backport-pull-request

Bumps [pontos](https://github.com/greenbone/pontos) from 23.7.6 to 23.7.7.
- [Release notes](https://github.com/greenbone/pontos/releases)
- [Commits](greenbone/pontos@v23.7.6...v23.7.7)

---
updated-dependencies:
- dependency-name: pontos
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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