[Java] Upgrade to Mockito 5.23.0.

(cherry picked from commit 530054f)

Author: vyazelenko

gradle/libs.versions.toml

@@ -13,7 +13,7 @@ httpcore = "4.4.14"
 jgit = "7.3.0.202506031305-r"
 json = "20250517"
 junit = "6.0.3"
-mockito = "5.22.0"
+mockito = "5.23.0"
 plexus = "3.3.0"
 sbe = "1.37.1"
 shadow = "9.3.2"