Update dependency org.mockito:mockito-core to v5.15.2

Author: renovate[bot]

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ dokka = "1.9.20"
 kotlin = "2.0.10"
 coroutines = "1.9.0"
 detekt = "1.23.6"
-mockito = "5.14.2"
+mockito = "5.15.2"
 nexus-publish = "2.0.0"
 junit = "4.13.2"