Bump symfony/framework-bundle from 3.4.21 to 3.4.34

Bumps [symfony/framework-bundle](https://github.com/symfony/framework-bundle) from 3.4.21 to 3.4.34.
- [Release notes](https://github.com/symfony/framework-bundle/releases)
- [Changelog](https://github.com/symfony/framework-bundle/blob/master/CHANGELOG.md)
- [Commits](symfony/framework-bundle@v3.4.21...v3.4.34)

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Author: dependabot[bot]