Update dependency org.mockito:mockito-core to v5.21.0

Author: renovate[bot]

pom.xml

@@ -99,7 +99,7 @@
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <version>5.14.2</version>
+      <version>5.21.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>