Bump symfony/event-dispatcher from 6.4.7 to 6.4.8

Bumps [symfony/event-dispatcher](https://github.com/symfony/event-dispatcher) from 6.4.7 to 6.4.8.
- [Release notes](https://github.com/symfony/event-dispatcher/releases)
- [Changelog](https://github.com/symfony/event-dispatcher/blob/7.1/CHANGELOG.md)
- [Commits](symfony/event-dispatcher@v6.4.7...v6.4.8)

---
updated-dependencies:
- dependency-name: symfony/event-dispatcher
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>