composer(deps-dev): Bump ergebnis/json-pointer from 3.3.0 to 3.4.0

Bumps [ergebnis/json-pointer](https://github.com/ergebnis/json-pointer) from 3.3.0 to 3.4.0.
- [Release notes](https://github.com/ergebnis/json-pointer/releases)
- [Changelog](https://github.com/ergebnis/json-pointer/blob/main/CHANGELOG.md)
- [Commits](ergebnis/json-pointer@3.3.0...3.4.0)

---
updated-dependencies:
- dependency-name: ergebnis/json-pointer
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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