Change CI branch from 'main' to 'dev'

.github/workflows/maven.yml

@@ -2,7 +2,7 @@ name: Java CI with Maven
 
 on:
   push:
-    branches: [ "main" ]
+    branches: [ "dev" ]
     tags:
       - 'v*.*.*'
   pull_request:
@@ -23,6 +23,7 @@ jobs:
         cache: maven
 
     - name: Build with Maven
+      # mvn package includes the 'test' phase, so unit tests run here automatically.
       run: mvn -B package
       working-directory: main