fix code style

dolphinscheduler-common/src/main/java/org/apache/dolphinscheduler/common/enums/TimeoutFlag.java

@@ -14,6 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.apache.dolphinscheduler.common.enums;
 
 import com.baomidou.mybatisplus.annotation.EnumValue;