[Java] Upgrade to JUnit 6.0.1.

Author: vyazelenko

gradle/libs.versions.toml

@@ -8,7 +8,7 @@ httpcore = "4.4.14"
 jqwik = "1.9.3"
 jmh = "1.37"
 json = "20250517"
-junit = "6.0.0"
+junit = "6.0.1"
 mockito = "5.20.0"
 plexus = "3.3.0"
 shadow = "9.2.2"