deps: update dependency commons-net:commons-net to v3.9.0 (#531)

Author: renovate-bot

pom.xml

@@ -87,7 +87,7 @@
       <dependency>
         <groupId>commons-net</groupId>
         <artifactId>commons-net</artifactId>
-        <version>3.8.0</version>
+        <version>3.9.0</version>
       </dependency>
     </dependencies>
   </dependencyManagement>