Update junit-framework monorepo to v6

Author: renovate[bot]

build.gradle.kts

@@ -45,8 +45,8 @@ dependencies {
     implementation("org.jetbrains:annotations:26.0.2")
 
     // JUnit and SLF4J for testing
-    testImplementation("org.junit.jupiter:junit-jupiter-engine:5.13.4")
-    testImplementation("org.junit.platform:junit-platform-launcher:1.13.4")
+    testImplementation("org.junit.jupiter:junit-jupiter-engine:6.0.3")
+    testImplementation("org.junit.platform:junit-platform-launcher:6.0.3")
     testImplementation("org.slf4j:slf4j-jdk14:2.0.17")
     testImplementation("org.assertj:assertj-core:3.27.3")
 }