Avoid duplicate GitHub action runs

Author: fredden

.github/workflows/coding-standard.yml

@@ -1,7 +1,15 @@
 name: ExtDN M2 Coding Standard
 on:
   push:
+    branches:
+      - 0.x
+      - 1.x
+      - 2.x
   pull_request:
+    branches:
+      - 0.x
+      - 1.x
+      - 2.x
 
 jobs:
   static:

.github/workflows/integration.yml

@@ -1,5 +1,15 @@
 name: ExtDN M2 Integration Tests
-on: [ push, pull_request ]
+on:
+  push:
+    branches:
+      - 0.x
+      - 1.x
+      - 2.x
+  pull_request:
+    branches:
+      - 0.x
+      - 1.x
+      - 2.x
 
 jobs:
   mage247:

.github/workflows/phpstan.yml

@@ -1,5 +1,15 @@
 name: ExtDN M2 PHPStan
-on: [ push, pull_request ]
+on:
+  push:
+    branches:
+      - 0.x
+      - 1.x
+      - 2.x
+  pull_request:
+    branches:
+      - 0.x
+      - 1.x
+      - 2.x
 
 jobs:
   phpstan:

.github/workflows/unit.yml

@@ -1,5 +1,15 @@
 name: ExtDN M2 Unit Tests
-on: [ push, pull_request ]
+on:
+  push:
+    branches:
+      - 0.x
+      - 1.x
+      - 2.x
+  pull_request:
+    branches:
+      - 0.x
+      - 1.x
+      - 2.x
 
 jobs:
   unit-tests-mage247: