fix(): Hide '#' from titles

Author: LevFlavien

styles/anchor.less

@@ -9,7 +9,7 @@ a.anchor {
     visibility: hidden;
 }
 
-h1, h2, h3, h4{
+h1, h2, h3, h4, h5, h6{
     &:hover .markdownIt-Anchor{
         color: @brand-info;
     }