ci: configure GitHub Actions to deploy to GitHub Pages

Author: jetsung

.github/workflows/deploy.yml

@@ -65,7 +65,7 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     needs: build
-    if: github.ref == 'refs/heads/main'
+    if: github.ref == 'refs/heads/develop'
     steps:
       - name: Deploy to GitHub Pages
         id: deployment