format: format using spotless

Author: FearfulTomcat27

iotdb-core/calc-commons/src/main/java/org/apache/iotdb/calc/execution/operator/source/relational/aggregation/AccumulatorFactory.java

@@ -49,8 +49,8 @@
 import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedMinAccumulator;
 import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedMinByAccumulator;
 import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedModeAccumulator;
-import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedRegressionAccumulator;
 import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedPercentileAccumulator;
+import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedRegressionAccumulator;
 import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedSumAccumulator;
 import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedUserDefinedAggregateAccumulator;
 import org.apache.iotdb.calc.execution.operator.source.relational.aggregation.grouped.GroupedVarianceAccumulator;