Fix CI by preinstalling playwright deps for tests

Author: pimterry

.github/workflows/ci.yml

@@ -17,7 +17,11 @@ jobs:
           node-version: ${{ matrix.node-version }}
 
       - run: npm install --no-package-lock
+
+      - name: Install Playwright Browsers
+        uses: microsoft/playwright-github-action@v1
       - run: npm test
+
       - run: npm run build-storybook --quiet
 
       - uses: actions/upload-artifact@v4