docs: fix typo os.raise -> os.raiselevel (#236)

typo os.raise -> os.raiselevel

Signed-off-by: sunrisepeak <[email protected]>

Author: Sunrisepeak

docs/zh/api/scripts/builtin-modules/os.md

@@ -478,7 +478,7 @@ os.raise("an error occurred")
 
 ```lua
 -- 抛出一个带 "an error occurred" 信息的异常
-os.raise(3, "an error occurred")
+os.raiselevel(3, "an error occurred")
 ```
 
 ## os.features