Changes in Application properties doesn't impact - Springboot

Question

I am using Spring boot 2.5.4. I have written web application. Now i am facing issue with application.properties file variables. If i am changing existing value, In code old value is been read, newly defined object is not coming.

Find the below application.properties file

spring.datasource.url=jdbc:mysql://XXXXXXXXXXX:3306/test
spring.datasource.username=user
spring.datasource.password=XXXXXXXXXXXXXXXX
spring.datasource.driver-class-name = com.mysql.cj.jdbc.Driver

# Config Variables
ml.url=https://google.com/ml/entities
main.url=https://xxxx.com/staging/mainfile

and application config java file

@Component
public class ApplicationConfig {
    
    @Value("${ml.url}")
    public String mlurl;

    @Value("${main.url}")
    public String mainurl;

   @PostConstruct
   public void initThat(){
      that = this;
    }
}

reading variable in code as

@RequestMapping("/readfile")
@RestController
public class AppointmentResource {

private static Logger S_LOGGER = LogManager.getLogger( AppointmentResource.class );

@Autowired
private ApplicationConfig applicationConfig;

@GetMapping(value = "/websiteUrl",produces = MediaType.APPLICATION_JSON_VALUE)
public String getProduct() {
    String websiteUrl = applicationConfig.mlurl;
    S_LOGGER.info("website url is " + websiteUrl);
    return websiteUrl;
}
}

After compiling for few times. Then i changes ml.url to https://google.com/prod/entities/test

but in code still i am getting as https://google.com/ml/entities.

Can anyone help in getting latest changes from application.properties

I am struck here. Help