Bump symfony/contracts from 2.3.0 to 2.3.1
Bump symfony/contracts from 2.3.0 to 2.3.1

Bumps [symfony/contracts](https://github.com/symfony/contracts) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/symfony/contracts/releases)
- [Changelog](https://github.com/symfony/contracts/blob/main/CHANGELOG.md)
- [Commits](https://github.com/symfony/contracts/compare/v2.3.0...v2.3.1)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
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