Align the Storybook build with Volto (#1739)

Author: stevepiercy

.github/workflows/build_deploy.yml

@@ -43,11 +43,9 @@ jobs:
         with:
           node-version: ${{ env.node-version }}
 
-      - uses: pnpm/action-setup@v3
-        name: Install pnpm
-        with:
-          version: 8
-          run_install: false
+      - name: Enable corepack
+        shell: bash
+        run: corepack enable
 
       - name: Get pnpm store directory
         shell: bash