Improve sample after Gradle update

Author: jjohannes

samples/versions-in-catalog/build-logic/src/main/kotlin/org.my.gradle.java-module.gradle.kts

@@ -5,9 +5,13 @@ plugins {
 
 group = "org.my"
 
-tasks.test {
-    useJUnitPlatform()
-    jvmArgs("-Dorg.slf4j.simpleLogger.defaultLogLevel=error")
+testing.suites.named<JvmTestSuite>("test") {
+    useJUnitJupiter()
+    targets.configureEach {
+        testTask {
+            jvmArgs("-Dorg.slf4j.simpleLogger.defaultLogLevel=error")
+        }
+    }
 }
 
 dependencies {