Change workflow trigger to ordinary push

.github/workflows/buildSite.yml

@@ -3,7 +3,7 @@ name: Build site
 # Controls when the workflow will run
 on:
   # Triggers the workflow on push or pull request events but only for the master branch
-  pull_request:
+  push:
     branches: [ master ]
 
   # Allows you to run this workflow manually from the Actions tab