I tend to believe Ronaldo did let Bruno take it, maybe they discussed at before the game or something, for 2 reasons:
1. Ronaldo didn’t feel he want to take it, as he is still emotionally pre-occupied and mourning the loss of his baby son, and not feeling he is in right mentality to take it. It’s totally understandable, maybe he shouldn’t even play this game.
2. Ronaldo knew Bruno has been in very poor form lately, so by letting him take penalty, may hopefully help him to regain his confidence/self-belief. He actually did this to Benzema before to help him out too, so it’s nothing new to him.