checkstyle: fix import ordering

Author: Alex Klymenko

src/test/java/com/thealgorithms/datastructures/queues/DequeTest.java

@@ -4,8 +4,8 @@
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNull;
 
-import org.junit.jupiter.api.Test;
 import java.util.NoSuchElementException;
+import org.junit.jupiter.api.Test;
 
 class DequeTest {