Can't find OpenCore-Patcher-GUI.app.zip to download on Github.

Every 'how-to' video shows this .zip listed on github that you have to download, unzip and run the opencore patcher app, but when I look at Github I don't see it listed in the download options, I'm obviously missing something obvious so please will somebody enlighten me? I'm not a github user - does one have to be signed in to see the full list of files?