feat: Add Mozilla Build bootstrap step to alpha.yml workflow

.github/workflows/alpha.yml

@@ -222,6 +222,10 @@ jobs:
       - name: Install dependencies
         run: |
           pnpm i
+
+      - name: Bootstrap Mozilla Build
+        run: pnpm gluon bootstrap
+
       - name: Load gluon CI setup
         run: pnpm gluon ci --brand alpha --display-version ${{ needs.build-data.outputs.version }}