Update README.md

RPG3D · web-flow · commit e7cacf3faf23 · 2022-06-11T22:59:30.000+08:00
diff --git a/README.md b/README.md
@@ -12,7 +12,7 @@ A http based file download plugin for Unreal Engine 5+
 
 ## usages
 Pseudo code
-```
+```lua
 --add task on button clicked event 
 local DownloadMgr = UE4.UGameplayStatics.SpawnObject(UE4.UFileDownloadManager)
 
