Deps: Bump pontos from 26.4.2 to 26.4.3

Bumps [pontos](https://github.com/greenbone/pontos) from 26.4.2 to 26.4.3.
- [Release notes](https://github.com/greenbone/pontos/releases)
- [Commits](greenbone/pontos@v26.4.2...v26.4.3)

---
updated-dependencies:
- dependency-name: pontos
  dependency-version: 26.4.3
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]