fix typo (#4082)

oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/manual/relation/instance/ServiceInstanceRelationClientSideMetrics.java

@@ -97,7 +97,7 @@ public class ServiceInstanceRelationClientSideMetrics extends Metrics {
     @Override
     public Metrics toDay() {
         ServiceInstanceRelationClientSideMetrics metrics = new ServiceInstanceRelationClientSideMetrics();
-        metrics.setTimeBucket(toTimeBucketInHour());
+        metrics.setTimeBucket(toTimeBucketInDay());
         metrics.setSourceServiceId(getSourceServiceId());
         metrics.setSourceServiceInstanceId(getSourceServiceInstanceId());
         metrics.setDestServiceId(getDestServiceId());
@@ -110,7 +110,7 @@ public class ServiceInstanceRelationClientSideMetrics extends Metrics {
     @Override
     public Metrics toMonth() {
         ServiceInstanceRelationClientSideMetrics metrics = new ServiceInstanceRelationClientSideMetrics();
-        metrics.setTimeBucket(toTimeBucketInHour());
+        metrics.setTimeBucket(toTimeBucketInMonth());
         metrics.setSourceServiceId(getSourceServiceId());
         metrics.setSourceServiceInstanceId(getSourceServiceInstanceId());
         metrics.setDestServiceId(getDestServiceId());