Bump symfony/http-client from 6.4.12 to 6.4.15

Bumps [symfony/http-client](https://github.com/symfony/http-client) from 6.4.12 to 6.4.15.
- [Release notes](https://github.com/symfony/http-client/releases)
- [Changelog](https://github.com/symfony/http-client/blob/7.1/CHANGELOG.md)
- [Commits](symfony/http-client@v6.4.12...v6.4.15)

---
updated-dependencies:
- dependency-name: symfony/http-client
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>