Fix typo of Asia/Shanghai (#22242)

As the title.

Author: wolfogre

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -1145,7 +1145,7 @@ in this mapping or the filetype using heuristics.
 ## Time (`time`)
 
 - `FORMAT`: Time format to display on UI. i.e. RFC1123 or 2006-01-02 15:04:05
-- `DEFAULT_UI_LOCATION`: Default location of time on the UI, so that we can display correct user's time on UI. i.e. Shanghai/Asia
+- `DEFAULT_UI_LOCATION`: Default location of time on the UI, so that we can display correct user's time on UI. i.e. Asia/Shanghai
 
 ## Task (`task`)