fix: bigger menu header font size

src/menu/menu_old.css

@@ -245,7 +245,7 @@
 }
 
 .bytm-ftconf-category-header {
-  font-size: 18px;
+  font-size: 20px;
   margin-top: 32px;
   margin-bottom: 8px;
   padding: 0px 20px;