composer(deps): Bump symfony/error-handler from 6.4.0 to 6.4.3

Bumps [symfony/error-handler](https://github.com/symfony/error-handler) from 6.4.0 to 6.4.3.
- [Release notes](https://github.com/symfony/error-handler/releases)
- [Changelog](https://github.com/symfony/error-handler/blob/7.0/CHANGELOG.md)
- [Commits](symfony/error-handler@v6.4.0...v6.4.3)

---
updated-dependencies:
- dependency-name: symfony/error-handler
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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