Description error fix

Description matched another message

Former-commit-id: 3c2aad04a1c3cd7de68f690e18e1be5a55d75dc5

_locales/zh_CN/messages.json

@@ -293,7 +293,7 @@
     },
     "optionsAddRuleTooltip": {
         "message": "添加规则",
-        "description": "Popup text 'Delete the rule' in the options page"
+        "description": "Popup text 'Add the rule' in the options page"
     },
     "optionsValidateChangesTooltip": {
         "message": "验证更改",
@@ -446,4 +446,4 @@
     "__WET_LOCALE__": {
         "message": "zh-cn"
     }
-}
+}