Bump symfony/http-foundation from 6.4.4 to 6.4.21

Bumps [symfony/http-foundation](https://github.com/symfony/http-foundation) from 6.4.4 to 6.4.21.
- [Release notes](https://github.com/symfony/http-foundation/releases)
- [Changelog](https://github.com/symfony/http-foundation/blob/7.2/CHANGELOG.md)
- [Commits](symfony/http-foundation@v6.4.4...v6.4.21)

---
updated-dependencies:
- dependency-name: symfony/http-foundation
  dependency-version: 6.4.21
  dependency-type: indirect
...

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

Author: dependabot[bot]