Fix default resourcesShortage

dao/src/main/java/org/thingsboard/server/dao/notification/DefaultNotifications.java

@@ -401,7 +401,7 @@ public class DefaultNotifications {
             .icon("warning")
             .rule(DefaultRule.builder()
                     .name("Resources shortage")
-                    .triggerConfig(ResourcesShortageNotificationRuleTriggerConfig.builder().resource(Resource.CPU.name()).cpuThreshold(80).storageThreshold(80).ramThreshold(80).build())
+                    .triggerConfig(ResourcesShortageNotificationRuleTriggerConfig.builder().resource(Resource.CPU.name()).cpuThreshold(0.8f).storageThreshold(0.8f).ramThreshold(0.8f).build())
                     .description("Send notification to system admins when resources shortage is running low")
                     .build())
             .color(RED_COLOR)