modified test class name

Signed-off-by: Emmanuel Mireku Omari <omariemmanuel91@gmail.com>

Author: 3ga01

core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/math/percentagedifferencebetweentwonumberstest/PercentageDifferenceBetweenTwoNumbersTest.java renamed to core-java-modules/core-java-lang-math-4/src/test/java/com/baeldung/math/percentagedifferencebetweentwonumberstest/PercentageDifferenceBetweenTwoNumbersUnitTest.java

@@ -6,7 +6,7 @@
 import com.baeldung.math.percentagedifferecebetweentwonumbers.PercentageDifferenceBetweenTwoNumbers;
 import org.junit.jupiter.api.Test;
 
-class PercentageDifferenceBetweenTwoNumbersTest {
+class PercentageDifferenceBetweenTwoNumbersUnitTest {
 
   @Test
   void whenCalculatePercentageDifferenceBetweenTwoNumbers_thenCorrectResult() {