Update mock injection example to make the behavior clear

mockito-mocks-spring-beans/src/main/java/com/baeldung/NameService.java

@@ -5,6 +5,6 @@ import org.springframework.stereotype.Service;
 @Service
 public class NameService {
     public String getUserName(String id) {
-        return "Baeldung";
+        return "Real user name";
     }
 }

mockito-mocks-spring-beans/src/test/java/com/baeldung/UserServiceTest.java

@@ -22,10 +22,10 @@ public class UserServiceTest {
 
     @Test
     public void whenUserIdIsProvided_thenRetrievedNameIsCorrect() {
-        Mockito.when(nameService.getUserName("SomeId")).thenReturn("Baeldung");
+        Mockito.when(nameService.getUserName("SomeId")).thenReturn("Mock user name");
 
         String testName = userService.getUserName("SomeId");
 
-        Assert.assertEquals("Baeldung", testName);
+        Assert.assertEquals("Mock user name", testName);
     }
 }