Update pr-preview.yml

Author: nicolethoen

.github/workflows/pr-preview.yml

@@ -48,8 +48,10 @@ jobs:
       - run: node .github/upload-preview.js packages/module/public
         name: Upload docs
         if: always()
+      - name: Install Chrome for Puppeteer
+        run: npx puppeteer browsers install chrome  
       - run: npm run serve:docs & npm run test:a11y
         name: a11y tests
       - run: node .github/upload-preview.js packages/module/coverage
         name: Upload a11y report
-        if: always()
+        if: always()