Bump symfony/framework-bundle from 6.3.8 to 6.4.3

Bumps [symfony/framework-bundle](https://github.com/symfony/framework-bundle) from 6.3.8 to 6.4.3.
- [Release notes](https://github.com/symfony/framework-bundle/releases)
- [Changelog](https://github.com/symfony/framework-bundle/blob/7.0/CHANGELOG.md)
- [Commits](symfony/framework-bundle@v6.3.8...v6.4.3)

---
updated-dependencies:
- dependency-name: symfony/framework-bundle
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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