Update mockito-core to 5.20.0 (#1968)

Author: scala-steward

project/Dependencies.scala

@@ -15,7 +15,7 @@ object Dependencies {
     // For testing
     val annotationApi           = "1.3.2"
     val cats                    = "2.6.1"
-    val mockito                 = "5.19.0"
+    val mockito                 = "5.20.0"
     val munit                   = "1.1.0"
     val scalaTest               = "3.2.19"
     val scalaTestPlusMockito    = "3.1.0.0"