Update description in GitHub Actions

Author: mdmintz

.github/workflows/pages.yml

@@ -1,5 +1,5 @@
-# Sample workflow for building and deploying a Jekyll site to GitHub Pages
-name: Deploy Jekyll with GitHub Pages dependencies preinstalled
+# Build and deploy a Jekyll site to GitHub Pages
+name: Deploy docs to GitHub Pages
 
 on:
   # Runs on pushes targeting the default branch
@@ -15,7 +15,7 @@ permissions:
   pages: write
   id-token: write
 
-# Allow one concurrent deployment
+# Allow only one concurrent deployment
 concurrency:
   group: "pages"
   cancel-in-progress: false