Bump symfony/process from 6.3.4 to 6.4.0

Bumps [symfony/process](https://github.com/symfony/process) from 6.3.4 to 6.4.0.
- [Release notes](https://github.com/symfony/process/releases)
- [Changelog](https://github.com/symfony/process/blob/7.0/CHANGELOG.md)
- [Commits](symfony/process@v6.3.4...v6.4.0)

---
updated-dependencies:
- dependency-name: symfony/process
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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