chnage fontsize of page item count

packages/app/src/styles/_page-tree.scss

@@ -51,6 +51,7 @@ $grw-pagetree-item-padding-left: 10px;
 
       .grw-pagetree-count {
         padding: 0.1rem 0.3rem;
+        font-size: 12px;
       }
     }
   }