Bump guardian/actions-riff-raff from 4.1.2 to 4.2.3

Bumps [guardian/actions-riff-raff](https://github.com/guardian/actions-riff-raff) from 4.1.2 to 4.2.3.
- [Release notes](https://github.com/guardian/actions-riff-raff/releases)
- [Commits](guardian/actions-riff-raff@v4.1.2...v4.2.3)

---
updated-dependencies:
- dependency-name: guardian/actions-riff-raff
  dependency-version: 4.2.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/ab-testing-ui.yml

@@ -62,7 +62,7 @@ jobs:
           path: output/ab-tests.html
 
       - name: Riff-Raff Upload
-        uses: guardian/actions-riff-raff@v4.1.9
+        uses: guardian/actions-riff-raff@v4.2.3
         with:
           roleArn: ${{ secrets.GU_RIFF_RAFF_ROLE_ARN }}
           githubToken: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/publish.yml

@@ -55,7 +55,7 @@ jobs:
 
       # All rendering apps deployment
       - name: Upload rendering apps to RiffRaff
-        uses: guardian/actions-riff-raff@v4.1.2
+        uses: guardian/actions-riff-raff@v4.2.3
         with:
           githubToken: ${{ secrets.GITHUB_TOKEN }}
           roleArn: ${{ secrets.GU_RIFF_RAFF_ROLE_ARN }}