Update dependency org.junit:junit-bom to v6

Author: renovate[bot]

gradle/libs.versions.toml

@@ -6,7 +6,7 @@ h2 = "2.4.240"
 postgresql = "42.7.8"
 
 # Testing
-junit = "5.14.0"
+junit = "6.0.0"
 testcontainers = "1.21.3"
 
 # Plugins