fix: set up the ci runner for doc deployment (AztecProtocol#6160)

Please read [contributing guidelines](CONTRIBUTING.md) and remove this
line.

.github/workflows/publish-docs.yml

@@ -27,6 +27,10 @@ jobs:
       - uses: actions/checkout@v4
         with:
           ref: ${{ inputs.tag || env.GITHUB_REF }}
+      - uses: ./.github/ci-setup-action
+        with:
+          dockerhub_password: "${{ secrets.DOCKERHUB_PASSWORD }}"
+          concurrency_key: docs-preview-${{ inputs.username || github.actor }}-x86
 
       - timeout-minutes: 25
         run: earthly --no-output ./docs/+deploy-prod --NETLIFY_AUTH_TOKEN=${{ secrets.NETLIFY_AUTH_TOKEN }} --NETLIFY_SITE_ID=${{ secrets.NETLIFY_SITE_ID }}