Bump mockito.version from 5.20.0 to 5.21.0 (#480)

Author: jonesbusy

pom.xml

@@ -66,7 +66,7 @@
     <junit.version>6.0.1</junit.version>
     <testcontainer.version>1.21.3</testcontainer.version>
     <wiremock.version>3.13.2</wiremock.version>
-    <mockito.version>5.20.0</mockito.version>
+    <mockito.version>5.21.0</mockito.version>
     <system.stubs.version>2.1.8</system.stubs.version>
     <classgraph.version>4.8.184</classgraph.version>