Update dependency org.mockito:mockito-core to v5.21.0 (#2785)

Author: Goooler

gradle.properties

@@ -32,5 +32,5 @@ VER_DURIAN=1.2.0
 VER_JGIT=7.4.0.202509020913-r
 VER_JUNIT=6.0.1
 VER_ASSERTJ=3.27.6
-VER_MOCKITO=5.20.0
+VER_MOCKITO=5.21.0
 VER_SELFIE=2.5.5