chore(deps): bump guardian/actions-riff-raff from 3.0.0 to 3.3.1

Bumps [guardian/actions-riff-raff](https://github.com/guardian/actions-riff-raff) from 3.0.0 to 3.3.1.
- [Release notes](https://github.com/guardian/actions-riff-raff/releases)
- [Commits](guardian/actions-riff-raff@v3.0.0...v3.3.1)

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

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

.github/workflows/ci.yml

@@ -83,7 +83,7 @@ jobs:
         with:
           role-to-assume: ${{ secrets.GU_RIFF_RAFF_ROLE_ARN }}
           aws-region: eu-west-1
-      - uses: guardian/actions-riff-raff@v3.0.0
+      - uses: guardian/actions-riff-raff@v3.3.1
         if: "! github.event.pull_request.head.repo.fork"
         with:
           githubToken: ${{ secrets.GITHUB_TOKEN }}