add VERCEL_PREVIEW_URL

Author: avivkeller

.github/workflows/playwright.yml

@@ -81,3 +81,5 @@ jobs:
       - name: Run Playwright tests
         working-directory: apps/site
         run: pnpm playwright
+        env:
+          VERCEL_PREVIEW_URL: ${{ needs.get-vercel-preview.outputs.url }}