Don’t worry about it at all. This is one of the few times where it’s actually good to have a stutter, imo. Colleges love being inclusive and having all different types of people. It will make you stand out to them right from the bat. For my college essay, I had to write about overcoming a difficulty in my life and I used my stutter for it. I explained how I’ve been stuttering ever since I could talk and how I used to fear speaking when I was younger to the point where I was basically mute. Then I explained how I grew to accept to and never let it hold me back from doing anything. I got accepted to every college I applied to and my grades were only decent, so I knew it was the essay they must have liked.