Bump symfony/ux-autocomplete from 2.19.2 to 2.21.0

Bumps [symfony/ux-autocomplete](https://github.com/symfony/ux-autocomplete) from 2.19.2 to 2.21.0.
- [Changelog](https://github.com/symfony/ux-autocomplete/blob/2.x/CHANGELOG.md)
- [Commits](symfony/ux-autocomplete@v2.19.2...v2.21.0)

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

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