Bump the php-prod group across 1 directory with 2 updates

Bumps the php-prod group with 1 update in the / directory: [twig/extra-bundle](https://github.com/twigphp/twig-extra-bundle).


Updates `twig/extra-bundle` from 3.20.0 to 3.21.0
- [Commits](twigphp/twig-extra-bundle@v3.20.0...v3.21.0)

Updates `twig/twig` from 3.20.0 to 3.21.0
- [Changelog](https://github.com/twigphp/Twig/blob/3.x/CHANGELOG)
- [Commits](twigphp/Twig@v3.20.0...v3.21.0)

---
updated-dependencies:
- dependency-name: twig/extra-bundle
  dependency-version: 3.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: php-prod
- dependency-name: twig/twig
  dependency-version: 3.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: php-prod
...

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

Author: dependabot[bot]