chore: update help url

Author: sylingd

locale/original/messages.json

@@ -441,7 +441,7 @@
     "description": "URL of documentations, if not translated, please use english version"
   },
   "url_help": {
-    "message": "https://he.firefoxcn.net/en-US/",
+    "message": "https://he.firefoxcn.net/en-US/guide",
     "description": "URL of documentations, if not translated, please use english version"
   },
   "url_third_party_rules": {