Update deploy action

Author: NigelOToole

.github/workflows/deploy.yml

@@ -5,7 +5,7 @@ name: Deploy static content to Pages
 on:
   # Runs on pushes targeting the default branch
   push:
-    branches: [$default-branch]
+    branches: ["master"]
 
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch: