Update DeployPages.yml

Author: ytdHuang

.github/workflows/DeployPages.yml

@@ -6,6 +6,9 @@ on:
     branches:
       - "gh-pages"
 
+  # manually trigger the workflow
+  workflow_dispatch:
+
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
 permissions:
   contents: read