add translation to JP and CN

packages/app/resource/locales/ja_JP/translation.json

@@ -158,6 +158,7 @@
   "Sidebar mode on Editor": "サイドバーモード(編集時)",
   "No bookmarks yet": "No bookmarks yet",
   "add_bookmark": "ブックマークに追加",
+  "delete_bookmark": "ブックマークを削除",
   "Recent Created": "最新の作成",
   "Recent Changes": "最新の変更",
   "Page Tree": "ページツリー",

packages/app/resource/locales/zh_CN/translation.json

@@ -164,6 +164,7 @@
   "Disassociate": "解除关联",
   "No bookmarks yet": "暂无书签",
   "add_bookmark": "添加到书签",
+  "delete_bookmark": "删除书签",
 	"Recent Created": "最新创建",
   "Recent Changes": "最新修改",
   "Page Tree": "页面树",