Update UniqueSubsequencesCountTest.java

Author: Tuhinm2002

src/test/java/com/thealgorithms/dynamicprogramming/UniqueSubsequencesCountTest.java

@@ -4,7 +4,7 @@
 
 import org.junit.jupiter.api.Test;
 
-public class UniqueSubsequencesCountTest {
+public final class UniqueSubsequencesCountTest {
 
     @Test
     void subseqCountTestOne() {