Bump symfony/security-http from 7.1.6 to 7.1.8 in the composer group

Bumps the composer group with 1 update: [symfony/security-http](https://github.com/symfony/security-http).


Updates `symfony/security-http` from 7.1.6 to 7.1.8
- [Release notes](https://github.com/symfony/security-http/releases)
- [Changelog](https://github.com/symfony/security-http/blob/7.1/CHANGELOG.md)
- [Commits](symfony/security-http@v7.1.6...v7.1.8)

---
updated-dependencies:
- dependency-name: symfony/security-http
  dependency-type: indirect
  dependency-group: composer
...

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