Problemas com o @Valid Sping Boot

Bom dia , verifiquei em outros post no forúm o mesmo erro da @Valid, fiz as modificações no pom de acordo as respostas no forum ,mesmo assim não valida o form, vou colocar o código aqui .... outra coisa minha versão do spring boot é 2.6.2 .

<groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.2</version>

segue o código abaixo:

@RestController
@RequestMapping("/topicos")    
public class TopicosController {

    @Autowired
    private TopicoRepository topicoRepository;

    @Autowired
    private CursoRepository cursoRepository;

    @GetMapping
    public List<TopicoDto> lista(String nomeCurso){
        if(nomeCurso==null) {

            List<Topico>      topicos = topicoRepository.findAll();            
            return  TopicoDto.converter(topicos);    
        }else {
            List<Topico>      topicos = topicoRepository.findByCursoNome(nomeCurso);            
            return  TopicoDto.converter(topicos);
        }                    
    }

    @PostMapping
    public ResponseEntity<TopicoDto> cadastrar(@RequestBody @Valid TopicoForm topicoForm, UriComponentsBuilder uriBuilder) {
        Topico topico = topicoForm.converter(cursoRepository);
        topicoRepository.save(topico);

        URI uri = uriBuilder.path("/topicos/{id}").buildAndExpand(topico.getId()).toUri();

        return ResponseEntity.created(uri).body(new TopicoDto(topico));
    }
}

@RestControllerAdvice
public class ErroDeValidacaoHandler {

    @Autowired
    private MessageSource messageSource;

    @ResponseStatus(code = HttpStatus.BAD_REQUEST)
    @ExceptionHandler(MethodArgumentNotValidException.class)
    public List<ErroDeFormularioDto> handle(MethodArgumentNotValidException exception) {
        List<ErroDeFormularioDto> dto = new ArrayList<>();

        List<FieldError> fieldErrors = exception.getBindingResult().getFieldErrors();

        fieldErrors.forEach(e -> {
            String mensagem = messageSource.getMessage(e,LocaleContextHolder.getLocale());
            ErroDeFormularioDto erro = new ErroDeFormularioDto(e.getField(), mensagem);

            dto.add(erro);
        });

        return dto;
    }
}

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.2</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>br.com.alura</groupId>
    <artifactId>forum</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>forum</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
        </dependency>

       <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
        </dependency>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.validation/validation-api -->
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>2.0.1.Final</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>7.0.2.Final</version>
        </dependency>

    </dependencies>

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

</project>