fix: applies spotlessApply

Author: zionbuch

lesson_15/tdd/tdd_app/src/test/java/com/codedifferently/lesson15/EmployeeManagerTest.java

@@ -1,6 +1,8 @@
 package com.codedifferently.lesson15;
+
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.jupiter.api.Assertions.assertEquals;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;