revert default branch back to main

Author: mstop4

.github/workflows/main.yml

@@ -4,7 +4,7 @@ name: Deploy static content to Pages
 on:
   # Runs on pushes targeting the default branch
   push:
-    branches: [$default-branch]
+    branches: ['main']
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch: