Bump symfony/serializer from 5.3.10 to 5.3.12

Bumps [symfony/serializer](https://github.com/symfony/serializer) from 5.3.10 to 5.3.12. - [Release notes](https://github.com/symfony/serializer/releases) - [Changelog](https://github.com/symfony/serializer/blob/5.3/CHANGELOG.md) - [Commits](symfony/serializer@v5.3.10...v5.3.12) --- updated-dependencies: - dependency-name: symfony/serializer dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]