Enable manual triggering for deployment workflow

Add manual trigger option for GitHub Actions workflow

Author: UkemeSkywalker

.github/workflows/deploy-to-github-pages.yml

@@ -5,6 +5,8 @@ on:
   # Runs on pushes to the main branch - Means it will also run when PR is merged
   push:
     branches: ["main"]
+  # Allows manual triggering from the Actions tab
+  workflow_dispatch:
 
 
 # Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages