Update GH actions triggers

Author: jjohannes

.github/workflows/ci-build.yml

@@ -1,13 +1,19 @@
 name: Build Plugin
-on: [ push, pull_request ]
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
 jobs:
   gradle-build:
     runs-on: ubuntu-latest
     steps:
       - name: git clone
         uses: actions/checkout@v4
       - name: Set up JDK
-        uses: actions/setup-java@v4.2.1
+        uses: actions/setup-java@v4
         with:
           distribution: temurin
           java-version: 11