.github/workflows/Test.yml: limit doc to push on master branch

Author: trabucayre

.github/workflows/Test.yml

@@ -2,15 +2,13 @@ name: Test
 
 on:
   push:
-    branches:
-      - master   # Only trigger workflow on pushes to master
   pull_request:
   workflow_dispatch:
 
 jobs:
 
   doc:
-    if: github.ref == 'refs/heads/master'
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
     runs-on: ubuntu-latest
     name: '📓 Docs'