fix: add missing deployment ID in GitHub Pages workflow

Author: caio-pizzol

.github/workflows/deploy-demo.yml

@@ -16,6 +16,9 @@ permissions:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
     steps:
       - name: Generate token
         id: generate_token
@@ -52,4 +55,5 @@ jobs:
           path: ./demo/dist
 
       - name: Deploy to GitHub Pages
+        id: deployment
         uses: actions/deploy-pages@v4