fix code style

Author: ferenc-csaky

flink-connector-pulsar/src/test/java/org/apache/flink/connector/pulsar/sink/PulsarSinkITCase.java

@@ -35,9 +35,9 @@
 import org.apache.flink.connector.testframe.junit.annotations.TestExternalSystem;
 import org.apache.flink.connector.testframe.junit.annotations.TestSemantics;
 import org.apache.flink.connector.testframe.testsuites.SinkTestSuiteBase;
+import org.apache.flink.core.execution.CheckpointingMode;
 import org.apache.flink.runtime.minicluster.RpcServiceSharing;
 import org.apache.flink.runtime.testutils.MiniClusterResourceConfiguration;
-import org.apache.flink.core.execution.CheckpointingMode;
 import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
 import org.apache.flink.test.junit5.MiniClusterExtension;
 import org.apache.flink.testutils.junit.SharedObjectsExtension;