docs(style-guide): fix typo (#3113)

Author: ishaba

public/docs/ts/latest/guide/style-guide.jade

@@ -1823,7 +1823,7 @@ a(href="#toc") Back to top
 .l-main-section
 :marked
   ### <a id="05-15"></a>Delegate complex component logic to services
-  #### <a href="#05-14">Style 05-15</a>
+  #### <a href="#05-15">Style 05-15</a>
 
 .s-rule.do
   :marked