Bump twig/twig from 3.18.0 to 3.21.1

Bumps [twig/twig](https://github.com/twigphp/Twig) from 3.18.0 to 3.21.1.
- [Changelog](https://github.com/twigphp/Twig/blob/3.x/CHANGELOG)
- [Commits](twigphp/Twig@v3.18.0...v3.21.1)

---
updated-dependencies:
- dependency-name: twig/twig
  dependency-version: 3.21.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]