Fix typo (#315)

ThoralfHaensel · web-flow · commit e5341418589b · 2021-02-01T09:23:06.000-03:00
diff --git a/docs/checks/number-interfaces.md b/docs/checks/number-interfaces.md
@@ -4,7 +4,7 @@
 
 ### What is the Intent of the Check?
 
-Thhis check counts the number of interfaces up to a maximum. If there are too many interfaces in a class, it is an indicator that the [single responsibility principle](https://en.wikipedia.org/wiki/Single_responsibility_principle) is violated.
+This check counts the number of interfaces up to a maximum. If there are too many interfaces in a class, it is an indicator that the [single responsibility principle](https://en.wikipedia.org/wiki/Single_responsibility_principle) is violated.
 
 ### How does the check work?
 
