ci(pr-review-companion): run independent steps in parallel

.github/workflows/pr-review-companion.yml

@@ -59,38 +59,53 @@ jobs:
       STATUS_CONTEXT: pr-review-companion
       STATUS_TARGET: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
     steps:
-      - name: Download artifact
-        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
-        with:
-          pattern: build
-          path: build
-          merge-multiple: true
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          run-id: ${{ github.event.workflow_run.id }}
+      - parallel:
+          - name: Download artifact
+            uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+            with:
+              pattern: build
+              path: build
+              merge-multiple: true
+              github-token: ${{ secrets.GITHUB_TOKEN }}
+              run-id: ${{ github.event.workflow_run.id }}
+
+          - name: Checkout (mdn/content)
+            uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+            with:
+              path: content
+              persist-credentials: false
 
       - name: Check for artifacts
         id: check
         if: hashFiles('build/') != ''
         run: echo "HAS_ARTIFACT=true" >> "$GITHUB_OUTPUT"
 
-      - name: Mark status as pending
-        if: steps.check.outputs.HAS_ARTIFACT
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          gh api "$STATUS_PATH" \
-            -f state=pending \
-            -f context="$STATUS_CONTEXT" \
-            -f description='Review deployment pending' \
-            -f target_url="$STATUS_TARGET"
-
-      - name: Authenticate with GCP
-        if: steps.check.outputs.HAS_ARTIFACT
-        uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093 # v3.0.0
-        with:
-          token_format: access_token
-          service_account: deploy-mdn-review-content@${{ secrets.GCP_PROJECT_NAME }}.iam.gserviceaccount.com
-          workload_identity_provider: projects/${{ secrets.WIP_PROJECT_ID }}/locations/global/workloadIdentityPools/github-actions/providers/github-actions
+      - parallel:
+          - name: Mark status as pending
+            if: steps.check.outputs.HAS_ARTIFACT
+            env:
+              GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+            run: |
+              gh api "$STATUS_PATH" \
+                -f state=pending \
+                -f context="$STATUS_CONTEXT" \
+                -f description='Review deployment pending' \
+                -f target_url="$STATUS_TARGET"
+
+          - name: Authenticate with GCP
+            if: steps.check.outputs.HAS_ARTIFACT
+            uses: google-github-actions/auth@7c6bc770dae815cd3e89ee6cdf493a5fab2cc093 # v3.0.0
+            with:
+              token_format: access_token
+              service_account: deploy-mdn-review-content@${{ secrets.GCP_PROJECT_NAME }}.iam.gserviceaccount.com
+              workload_identity_provider: projects/${{ secrets.WIP_PROJECT_ID }}/locations/global/workloadIdentityPools/github-actions/providers/github-actions
+
+          - name: Setup (mdn/content)
+            uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
+            if: steps.check.outputs.HAS_ARTIFACT
+            with:
+              node-version-file: "content/.nvmrc"
+              package-manager-cache: false
 
       - name: Setup gcloud
         if: steps.check.outputs.HAS_ARTIFACT
@@ -109,20 +124,6 @@ jobs:
           concurrency: 500
           process_gcloudignore: false
 
-      - name: Checkout (mdn/content)
-        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        if: steps.check.outputs.HAS_ARTIFACT
-        with:
-          path: content
-          persist-credentials: false
-
-      - name: Setup (mdn/content)
-        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
-        if: steps.check.outputs.HAS_ARTIFACT
-        with:
-          node-version-file: "content/.nvmrc"
-          package-manager-cache: false
-
       - name: Install (mdn/content)
         if: steps.check.outputs.HAS_ARTIFACT
         env: