fix(deps): update mockito monorepo to v5.21.0

Author: renovate[bot]

pom.xml

@@ -97,7 +97,7 @@
         <jakarta.el-api.version>3.0.4</jakarta.el-api.version>
         <jersey-common.version>2.47</jersey-common.version>
         <junit.version>6.0.2</junit.version>
-        <mockito.version>5.20.0</mockito.version>
+        <mockito.version>5.21.0</mockito.version>
         <bytebuddy.version>1.18.4</bytebuddy.version>
     </properties>