[FLINK-12009][runtime] Fix wrong check message about heartbeat interv…

…al for HeartbeatServices

This closes apache#8048.

flink-runtime/src/main/java/org/apache/flink/runtime/heartbeat/HeartbeatServices.java

@@ -40,7 +40,7 @@ public class HeartbeatServices {
 
 	public HeartbeatServices(long heartbeatInterval, long heartbeatTimeout) {
 		Preconditions.checkArgument(0L < heartbeatInterval, "The heartbeat interval must be larger than 0.");
-		Preconditions.checkArgument(heartbeatInterval <= heartbeatTimeout, "The heartbeat timeout should be larger or equal than the heartbeat timeout.");
+		Preconditions.checkArgument(heartbeatInterval <= heartbeatTimeout, "The heartbeat timeout should be larger or equal than the heartbeat interval.");
 
 		this.heartbeatInterval = heartbeatInterval;
 		this.heartbeatTimeout = heartbeatTimeout;