Bump junitVersion from 1.13.4 to 6.0.0 (#1561)

Author: dependabot[bot]

build.gradle

@@ -26,7 +26,7 @@ ext {
   confluentKafkaVersion = '7.9.0'
   scapegoatVersion = '3.1.9'
 
-  junitVersion = '1.13.4'
+  junitVersion = '6.0.0'
   testContainerVersion = '0.43.0'
 
   scriptsLocation = 'gradle' + File.separator + 'scripts' + File.separator // location of script plugins