Please advise me on how to modify the hamburger side bar's copyright section. Specifically, the part I've circled in red in the attached file, how should I change it?

I noticed that someone else had a similar question, and there was a diagram as an answer (as shown in my other attachment). However, even after following that path, I still don’t understand how to do it. Could you please explain it more clearly and in detail, step by step, on how to make the modifications? Thank you!