Use starting instead of using.

src/main/resources/lessons/webwolf_introduction/documentation/IntroductionWebWolf.adoc

@@ -1,7 +1,7 @@
 == Introducing WebWolf
 
 You only need WebWolf if a lesson specifies you can use it. For a lot of lessons you use WebGoat without
-starting WebWolf. Lessons where you can use WebWolf are marked with the following icon (top right in assignment):
+using WebWolf. Lessons where you can use WebWolf are marked with the following icon (top right in assignment):
 
 {nbsp}