Bump symfony/stimulus-bundle from 2.30.0 to 2.31.0 in /web/landing (#1903)

Bumps [symfony/stimulus-bundle](https://github.com/symfony/stimulus-bundle) from 2.30.0 to 2.31.0.
- [Changelog](https://github.com/symfony/stimulus-bundle/blob/2.x/CHANGELOG.md)
- [Commits](symfony/stimulus-bundle@v2.30.0...v2.31.0)

---
updated-dependencies:
- dependency-name: symfony/stimulus-bundle
  dependency-version: 2.31.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]