Bump symfony/yaml from 5.2.5 to 5.2.7 in /symfony

Bumps [symfony/yaml](https://github.com/symfony/yaml) from 5.2.5 to 5.2.7.
- [Release notes](https://github.com/symfony/yaml/releases)
- [Changelog](https://github.com/symfony/yaml/blob/5.x/CHANGELOG.md)
- [Commits](symfony/yaml@v5.2.5...v5.2.7)

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Author: dependabot[bot]