Temporarily increased timeout for Comments-UI web server init

refs https://github.com/TryGhost/Product/issues/3867

- this helps avoid flaky tests before we investigate further

apps/comments-ui/playwright.config.ts

@@ -57,6 +57,6 @@ export default defineConfig({
         command: `yarn dev:test`,
         url: `http://localhost:${E2E_PORT}/comments-ui.min.js`,
         reuseExistingServer: !process.env.CI,
-        timeout: 10000
+        timeout: 20000
     }
 });