fix: DD

Author: niuweili

flashduty/en/2. RUM/2. Applications/2. SDK Integration.md

@@ -106,7 +106,7 @@ Add the following code snippet to the beginning of the `head` tag in each `HTML`
 </script>
 ```
 
-You can check for loading issues with `window.DD_RUM` if the RUM browser SDK fails to load.
+You can check for loading issues with `window.FC_RUM` if the RUM browser SDK fails to load.
 
 
 

flashduty/zh/2. RUM/2. 应用管理/2. SDK接入.md

@@ -106,7 +106,7 @@ flashcatRum.init({
 </script>
 ```
 
-您可以用`window.DD_RUM`检查 RUM 浏览器 SDK 发生加载失败时出现的问题。
+您可以用`window.FC_RUM`检查 RUM 浏览器 SDK 发生加载失败时出现的问题。