Hi! Native French speaker here.
Duolingo won’t be accepted it because you used you (« Tu/Vous ») and the French sentence uses « nous » (we)
But you can always report it by clicking on the flag icon or on the report button (depending on which one appears on your device) next time.
Unfortunately the Duolingo staff doesn’t really read all the forums, so it’s the easiest way to let them know about things like that.
And it’s the only way to add new answers to the lesson.
Hope this helped…
Bonne journée et bonne étude!