Update faq.md

Author: charlierudolph

docs/faq.md

@@ -6,7 +6,7 @@ This has frequently been caused by the use of ES6 arrow functions.
 You cannot use ES6 arrow functions for step definitions or hooks because they bind `this`
 to the current context which prevents the world instance from being injected.
 
-### Why do my definition patterns need to be globally unique instead of unique only within `Given`, `When`, `Then`?
+#### Why do my definition patterns need to be globally unique instead of unique only within `Given`, `When`, `Then`?
 
 To encourage a ubiquitous, non-ambiguous domain language. 
 Using the same language to mean different things is basically the definition of ambiguous.