test(deps): update dependency org.mockito:mockito-core to v3.6.28 (#303)

Author: renovate-bot

java-storage-nio/google-cloud-nio/pom.xml

@@ -86,7 +86,7 @@
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <version>3.6.0</version>
+      <version>3.6.28</version>
       <scope>test</scope>
     </dependency><dependency>
       <groupId>org.hamcrest</groupId>