Bump symfony/process from 6.1.0 to 6.4.15 in /tools/php-cs-fixer in t…

…he composer group across 1 directory (#46)

Bump symfony/process

Bumps the composer group with 1 update in the /tools/php-cs-fixer directory: [symfony/process](https://github.com/symfony/process).


Updates `symfony/process` from 6.1.0 to 6.4.15
- [Release notes](https://github.com/symfony/process/releases)
- [Changelog](https://github.com/symfony/process/blob/7.2/CHANGELOG.md)
- [Commits](symfony/process@v6.1.0...v6.4.15)

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

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