Run tests on each pull request instead of push to main

Signed-off-by: Heiko Kiesel <heiko.kiesel@iteratec.com>

Author: Heiko Kiesel

.github/workflows/test.yml

@@ -6,7 +6,7 @@
 # For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
 
 name: Java Tests
-on: push
+on: pull_request
 
 jobs:
     build: