update mockito monorepo 5.18.0 to v5.20.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -18,7 +18,7 @@ coroutines = "1.10.2"
 fragment = "1.8.8"
 androidxComposeBom = "2025.07.00"
 composeActivity = "1.10.1"
-mockito = "5.18.0"
+mockito = "5.20.0"
 mockitoKotlin = "6.0.0"
 roboelectric = "4.15.1"
 turbine = "1.2.1"