Updated old Peggle addon to work again but not sure how to upload on github to existing project

Good afternoon/evening all,

I am unfamiliar with Github, but understand the premise of it. It's used to manage projects and merge in updates in a centralized location.

I downloaded the [Peggle addon](https://github.com/adamz01h/wow_peggle) and fixed the new errors from 9.0. I went to upload the updated lua file (I had to create an account), and it said it 'forked' the project. What does this mean? Does this mean others can see my upload? Do the original person/group that started the project need to approve before it is available to the public? I sent the author who updated the app in 8.0 a message via reddit.

Just looking for some advice!