Fix Workspace Hub CI setup

Author: RichardGeorgeDavis

.github/workflows/workspace-hub-ci.yml

@@ -30,19 +30,19 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 9.4.0
+          run_install: false
+
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
           node-version: "20"
           cache: "pnpm"
           cache-dependency-path: repos/workspace-hub/pnpm-lock.yaml
 
-      - name: Enable Corepack
-        run: corepack enable
-
-      - name: Activate pnpm
-        run: corepack prepare pnpm@9.4.0 --activate
-
       - name: Install dependencies
         run: pnpm install --frozen-lockfile