chore: update workflows setup for push action

Author: kioqq

Diff for: .github/workflows/build.yml

@@ -1,7 +1,8 @@
 name: Docker dry run
 
 on:
-    push:
+    push: 
+        branches: [ master ]
     pull_request:
     workflow_dispatch:
 

Diff for: .github/workflows/main.yml

@@ -5,7 +5,8 @@ concurrency:
   cancel-in-progress: true
 
 on:
-  push:
+  push: 
+    branches: [ master ]
   pull_request:
   workflow_dispatch: