Update CircularDoublyLinkedListTest.java

fixed build issues

Author: richk21

src/test/java/com/thealgorithms/datastructures/lists/CircularDoublyLinkedListTest.java

@@ -1,6 +1,7 @@
 package com.thealgorithms.datastructures.lists;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;