No Persistance provider

Cai em outro erro e acredito que fiz tudo igual ao professor

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1"
    xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
    <persistence-unit name="contas">
        <class>br.com.alura.jpa.modelo.Conta</class>
        <properties>
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost/alura_jpa?serverTimezone=UTC" />
            <property name="javax.persistence.jdbc.user" value="root" />
            <property name="javax.persistence.jdbc.password" value="xxx" />

            <property name="hibernate.hbm2ddl.auto" value="update"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MariaDBDialect"/>
            <property name="hibernate.show_sql" value="false"/>
            <property name="hibernate.format_sql" value="true"/>
        </properties>
    </persistence-unit>
</persistence>
``
Esse é o meu xml

package br.com.alura.jpa.testes;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

import br.com.alura.jpa.modelo.Conta;

public class CriaConta {
    public static void main(String[] args) {
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("alura");
        EntityManager em = emf.createEntityManager();

        Conta conta = new Conta();
        conta.setTitular("Rodrigo");
        conta.setNumero(1234);
        conta.setAgencia(4321);

        em.persist(conta);

esse é meu codigo

Exception in thread "main" javax.persistence.PersistenceException: No Persistence provider for EntityManager named alura

esse é o erro