Controller nao esta funcionando.

Eu fiz a mesma coisa que mostra na aula. Porem esta me dando o erro abaixo quando entro no /topicos

Whitelabel Error Page This application has no explicit mapping for /error, so you are seeing this as a fallback.

Thu Mar 25 20:21:48 BRT 2021 There was an unexpected error (type=Not Found, status=404).

Segue o meu controller: O meu spring é outra versao pq a que o professor falou nao tinha disponivel no inicializer

package br.com.alura.forum.controller;

import java.util.Arrays; import java.util.List;

import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody;

import br.com.alura.forum.modelo.Curso; import br.com.alura.forum.modelo.Topico;

@Controller public class TopicosController {

@RequestMapping("/topicos")
@ResponseBody
public List<Topico> lista(){
    Topico topico = new Topico("Duvida", "Duvida com Spring", new Curso("Spring", "Programação"));

    return Arrays.asList(topico, topico, topico);
} 

}

O meu POM.XML:

4.0.0 org.springframework.boot spring-boot-starter-parent 2.4.4 br.com.alura forum 0.0.1-SNAPSHOT forum API REST Forum Alura <java.version>1.8</java.version> org.springframework.boot spring-boot-starter-web

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>