increase font size for votes / comments

lms/static/sass/_discussion.scss

@@ -1182,7 +1182,7 @@ body.discussion {
       margin-top: 9px;
       border-radius: 2px;
       @include linear-gradient(top, #d4d4d4, #dfdfdf);
-      font-size: 9px;
+      font-size: 11px;
       font-weight: 700;
       line-height: 16px;
       text-align: center;