Avoid apt during Playwright browser install

GitHub's hosted runner already has the browser system dependencies needed for this VRT job. Installing only Chromium avoids failing the Argos job when external apt repositories are unavailable.

Author: john-kurkowski

.github/workflows/vrt.yml

@@ -47,7 +47,7 @@ jobs:
         run: npm run build
 
       - name: Install Playwright browser
-        run: npx playwright install --with-deps chromium
+        run: npx playwright install chromium
 
       - name: Argos
         run: npm run test:vrt