update docs

Signed-off-by: Nshawn_he <shawn.he@huawei.com>

en/device-dev/subsystems/subsys-dfx-hichecker.md

@@ -34,7 +34,7 @@ HiChecker provides the APIs listed in the following table.
 | NotifySlowProcess(std::string tag) : void | Notifies your application of a slow process so that your application avoids calling it directly in key threads.| 
 | NotifySlowEvent(std::string tag) : void | Notifies your application that event distribution or execution has timed out.| 
 | NotifyAbilityConnectionLeak(Caution caution) : void | Notifies your application that AbilityConnection leakage has occurred.| 
-| Caution | GetTriggerRule() : uint_64_t | Obtains the rule that triggers the current alarm.| 
+| GetTriggerRule() : uint_64_t | Obtains the rule that triggers the current alarm.| 
 | GetCautionMsg() : std::string | Obtains the alarm message.| 
 | GetStackTrace() : std::string | Obtains the stack when an alarm is triggered.|