Update GitHub Pages action

Author: ellenhp

.github/workflows/continuous_deployment.yml

@@ -3,8 +3,15 @@ on:
   push:
     branches: [main]
 
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
 jobs:
-  release:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2