ci: use pnpm

.github/workflows/playwright.yml

@@ -10,11 +10,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
+      - uses: pnpm/action-setup@v2
+        with:
+          version: 8
       - uses: actions/setup-node@v3
         with:
           node-version: 18
       - name: Install dependencies
-        run: npm ci
+        run: pnpm i
       - name: Install Playwright Browsers
         run: npx playwright install --with-deps
       - name: Run Playwright tests