feat: add doc link to third app setting

public/locales/en/setting.json

@@ -166,7 +166,8 @@
     "key": "API Secure Key",
     "update": "Update Secret",
     "update_tip": "Are you sure to update API secret? Previous secret will be invalided",
-    "key_tip": "The security key agreed between the server and the third-party app is used to encrypt the communication data."
+    "key_tip": "The security key agreed between the server and the third-party app is used to encrypt the communication data.",
+    "how_to": "How to use?"
   },
   "login": {
     "password": "Password",

public/locales/zh/setting.json

@@ -161,7 +161,8 @@
     "key": "API 安全密钥",
     "update": "更新安全密钥",
     "update_tip": "确定更新API安全密钥？之前密钥将作废",
-    "key_tip": "安全密钥用于服务器与第三方安全通信，请妥善保存！"
+    "key_tip": "安全密钥用于服务器与第三方安全通信，请妥善保存！",
+    "how_to": "使用文档"
   },
   "login": {
     "password": "密码登录",