Done the exact same thing before but later on 3rd/4th week of flower and i dont recomend it that late.. At this stage 2nd week of flower should be ok to lst them they will slightly come back up.
Definetly not late but maybe you will have to support those branches later or to reduce that risk just open it up slightly i mean dont bend them so much
I do recomend opening it slightly if you want to have more light penetration and airflow,
Nothing should happen tho you should be good to go.