Bump symfony/serializer from 4.3.11 to 4.4.35

Bumps [symfony/serializer](https://github.com/symfony/serializer) from 4.3.11 to 4.4.35.
- [Release notes](https://github.com/symfony/serializer/releases)
- [Changelog](https://github.com/symfony/serializer/blob/5.3/CHANGELOG.md)
- [Commits](symfony/serializer@v4.3.11...v4.4.35)

---
updated-dependencies:
- dependency-name: symfony/serializer
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>