docs: updata BoAT_User_Guide_en.md
updata BoAT_User_Guide_en.md ,
@@ -537,7 +537,7 @@ Before calling the SDK, you must call BoatIotSdkInit() to initialize the global
BOAT_RESULT BoatIotSdktInit(void);
````
-After the end of use, you should call BoatIotSdkDeInit() to release resources:
+If the SDK is no longer needed, call BoatIotSdkDeInit() to release resources:
````
void BoatIotSdkDeInit(void);
