I catch myself calling my daughter pretty a lot (which she is).
And there is nothing wrong with this!
However, girls are so much more than being pretty or being a princess or being cute.
Make sure you let girls know you value them when you see them being brave, or innovative, or clever, or strong.
And on the other side of the same coin, boys are more than “tough little guys” or bruisers, or future athletes. Let them know you value them for their more traditionally male traits as well as being creative, and thoughtful, and considerate.
Raise well rounded humans.