chore(deps): bump guardian/actions-riff-raff from 4.1.7 to 4.2.2

Bumps [guardian/actions-riff-raff](https://github.com/guardian/actions-riff-raff) from 4.1.7 to 4.2.2.
- [Release notes](https://github.com/guardian/actions-riff-raff/releases)
- [Commits](guardian/actions-riff-raff@v4.1.7...v4.2.2)

---
updated-dependencies:
- dependency-name: guardian/actions-riff-raff
  dependency-version: 4.2.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -72,7 +72,7 @@ jobs:
           npm install-clean
           npm test
           npm run build
-      - uses: guardian/actions-riff-raff@v4.1.7
+      - uses: guardian/actions-riff-raff@v4.2.2
         if: "! github.event.pull_request.head.repo.fork"
         with:
           githubToken: ${{ secrets.GITHUB_TOKEN }}