Bump symfony/var-dumper from 6.3.1 to 6.3.8 (#505)

Bumps [symfony/var-dumper](https://github.com/symfony/var-dumper) from 6.3.1 to 6.3.8.
- [Release notes](https://github.com/symfony/var-dumper/releases)
- [Changelog](https://github.com/symfony/var-dumper/blob/6.3/CHANGELOG.md)
- [Commits](symfony/var-dumper@v6.3.1...v6.3.8)

---
updated-dependencies:
- dependency-name: symfony/var-dumper
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>