FIX: Add pnpm to GitHub workflows

Author: MatteuSan

.github/workflows/integrate.yml

@@ -16,12 +16,11 @@ jobs:
       - uses: actions/checkout@v4
       - name: Use NodeJS version ${{ matrix.node-version }}
         uses: actions/setup-node@v4
-        with:
-          node-version: ${{ matrix.node-version }}
-          cache: 'pnpm'
       - name: Setup pnpm
         uses: pnpm/action-setup@v2.4.0
         with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'pnpm'
           version: '6'
       - run: pnpm install
       - run: pnpm test:sass