chore(deps): update dependency org.mockito:mockito-core to v5.6.0

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 kotest = "5.7.2"
 kotlin = "1.9.10"
-mockito = "5.5.0"
+mockito = "5.6.0"
 
 [libraries]
 kotlin-stdlib = { module = "org.jetbrains.kotlin:kotlin-stdlib", version.ref = "kotlin" }