3 Can't edit anything in gitlab

I’m a noob so forgive me if this is dumb but I can’t edit files in gitlab, I get the option to open in web ide or gitpod, but not the edit option. why could this be? How would I edit this file for example: https://gitlab.com/ok173/cs356-w21-arthur-olderich-souid/-/blob/main/homework2/app.py ?