Avoid double-running workflows on PR branches

Author: chadlwilson

.github/workflows/maven.yml

@@ -2,9 +2,9 @@ name: Java CI
 
 on:
   push:
-    branches-ignore: [ "internal*" ]
+    branches: [ "master", "*release*", "*stable*" ]
   pull_request:
-    branches: [ "master" ]
+    branches: [ "master", "*release*", "*stable*" ]
 
 jobs:
   build: