Update dependency org.junit.jupiter:junit-jupiter to v6

Author: renovate[bot]

gradle/libs.versions.toml

@@ -4,7 +4,7 @@ gradle-starter = "0.91.0"
 gradle-pluginpublish = "2.0.0"
 google-agp = "8.13.0"
 maven-kotlin = "2.2.20"
-maven-junit = "5.13.4"
+maven-junit = "6.0.0"
 maven-assertj = "3.27.6"
 maven-insetter = "0.6.1"
 maven-binarycompatiblity = "0.18.1"