Change action branches from main to v3

Author: Denis-Averin

.github/workflows/check-badges.yml

@@ -2,9 +2,9 @@ name: Check badges in README.md
 
 on:
   push:
-    branches: [ main ]
+    branches: [ v3 ]
   pull_request:
-    branches: [ main ]
+    branches: [ v3 ]
 
 jobs:
   build-and-test:

.github/workflows/check-style.yml

@@ -2,9 +2,9 @@ name: Java check style
 
 on:
   push:
-    branches: [ main ]
+    branches: [ v3 ]
   pull_request:
-    branches: [ main ]
+    branches: [ v3 ]
 
 jobs:
   lint:

.github/workflows/maven.yml

@@ -5,9 +5,9 @@ name: Java CI with Maven
 
 on:
   push:
-    branches: [ main ]
+    branches: [ v3 ]
   pull_request:
-    branches: [ main ]
+    branches: [ v3 ]
 
 jobs:
   test: