lesson: fix markdown at course material
lesson: fix markdown at course material

AllanNozomu/tecsaladeaula,AllanNozomu/tecsaladeaula,mupi/tecsaladeaula,mupi/tecsaladeaula,AllanNozomu/tecsaladeaula,mupi/tecsaladeaula,mupi/tecsaladeaula,AllanNozomu/tecsaladeaula