Fix header link

Author: sotarok

resource/css/_wiki.scss

@@ -42,7 +42,7 @@ div.body {
   .revision-head-link {
     display: none;
     font-size: 0.6em;
-    padding-top: 8px;
+    padding-top: 4px;
     padding-left: 10px;
   }
   &:hover .revision-head-link {