Bump symfony/yaml in the composer group across 1 directory

Bumps the composer group with 1 update in the / directory: [symfony/yaml](https://github.com/symfony/yaml).


Updates `symfony/yaml` from 6.4.30 to 6.4.40
- [Release notes](https://github.com/symfony/yaml/releases)
- [Changelog](https://github.com/symfony/yaml/blob/8.1/CHANGELOG.md)
- [Commits](symfony/yaml@v6.4.30...v6.4.40)

---
updated-dependencies:
- dependency-name: symfony/yaml
  dependency-version: 6.4.40
  dependency-type: direct:production
  dependency-group: composer
...

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

Author: dependabot[bot]