Fix maxQueueingTimeoutMs checking logic in GatewayRuleManager#isValidRule (#2609)

Author: DollarB

sentinel-adapter/sentinel-api-gateway-adapter-common/src/main/java/com/alibaba/csp/sentinel/adapter/gateway/common/rule/GatewayRuleManager.java

@@ -119,7 +119,7 @@ public static boolean isValidRule(GatewayFlowRule rule) {
                 || rule.getGrade() < 0 || rule.getCount() < 0 || rule.getBurst() < 0 || rule.getControlBehavior() < 0) {
             return false;
         }
-        if (rule.getGrade() == RuleConstant.CONTROL_BEHAVIOR_RATE_LIMITER
+        if (rule.getControlBehavior() == RuleConstant.CONTROL_BEHAVIOR_RATE_LIMITER
                 && rule.getMaxQueueingTimeoutMs() < 0) {
             return false;
         }