Update README.md

Author: lsiv568

src/data-structures/queue/assignment-1/README.md

@@ -9,6 +9,7 @@ Your first assignment is to use the Queue class to do the following:
 * Print the contents of the queue 
 * Print the first element of  the queue
 * Print the last element of the queue 
+* Print the total number of elements in the queue without modifying the queue itself
 
 **IMPORTANT**
-In order to accomplish the final task you may need to modify the Queue class to do this :)
+In order to accomplish some of the tasks you may need to modify the Queue class :)