The Bug：The method isValidRule(GatewayFlowRule rule) in GatewayRuleManager.class has a invalid check.

[rabbitloveLHF]

Type: Bug Report
The method isValidRule(GatewayFlowRule rule) in GatewayRuleManager.class has a invalid check.
ControlBehavior should be checked here, not grade.

public static boolean isValidRule(GatewayFlowRule rule) {
    if (rule.getGrade() == RuleConstant.CONTROL_BEHAVIOR_RATE_LIMITER
            && rule.getMaxQueueingTimeoutMs() < 0) {
        return false;
    }
}

The sentinel version is 1.8.1

[sczyh30]

Could you please contribute a PR to fix it?