Update dependency org.junit:junit-bom to v6

Author: renovate[bot]

versions-root/libs.versions.toml

@@ -16,7 +16,7 @@ logback = "1.3.14"
 gradle-plugin-publish = "1.3.1"
 kotlin-wrappers = "2025.6.11"
 junit4 = "4.13.2"
-junit5 = "5.13.2"
+junit5 = "6.0.0"
 intellij = "241.19416.19"
 kotlinx-browser = "0.3"
 dokka = "2.0.0"