Bump symfony/string from 7.4.6 to 7.4.8

Bumps [symfony/string](https://github.com/symfony/string) from 7.4.6 to 7.4.8.
- [Release notes](https://github.com/symfony/string/releases)
- [Changelog](https://github.com/symfony/string/blob/8.1/CHANGELOG.md)
- [Commits](symfony/string@v7.4.6...v7.4.8)

---
updated-dependencies:
- dependency-name: symfony/string
  dependency-version: 7.4.8
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]