Make PubSub work again with the changed WorkloadListener

src/de/tud/kom/p2psim/api/application/WorkloadListener.java

@@ -39,7 +39,7 @@ package de.tud.kom.p2psim.api.application;
  *
  *
  * 12.03.2017 Clemens Krug:
- * The getApplication method has been removed since it did not comply to a
+ * The getApplication method has been removed since it did not comply to the
  * typical Observer/Listener pattern. Instead  {@link #doWork(WorkloadItem)} was added
  * and the {@link Application}s should now handle the workloads accordingly.
  */