Honestly a bent banana is going to sound the same as a straight one. If you don't mind knowing that it is bent I would do nothing. If visually it annoys you I would straighten it with pliers, putting some fabric between the metal pin and the pliers so you don't scratch it. If you ever sell them I would replace it with a new one first.
Bent Audioquest Robin Hood banana plugs
In a misguided venture my son bent the banana plugs on my expensive Robin Hood speaker cables. Can these plugs be straightened out with a pliers or should I replace them or do nothing? They’re working right now.