ci: add missing steps

Author: danielroe

.github/workflows/nuxt-nightly.yml

@@ -13,6 +13,15 @@ jobs:
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:
+      - uses: actions/checkout@v4
+      - run: corepack enable
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: "pnpm"
+      - name: Install dependencies
+        run: pnpm install
+
       - name: Nuxt Nightly
         uses: danielroe/[email protected]