be able to update a note instead of creating a new each time
Gists provide a simple way to share code snippets (in this case, notes) with others. Every gist is a Git repository, which means that it can be forked and cloned. If you are signed in to GitHub when you create a gist, the gist will be associated with your account and you will see it in your list of gists when you navigate to your gist home page. ↩︎
One small suggestion (and I realize it may be too late) would be to name it either "Publish to Gist" or "Gist publsiher". Even having just installed it, when I went to try to find it on the plugin page I didn't think to look for it under "Joplin". Every plugin is for Joplin.
Anyway, this is a great plugin. Thanks so much for making it!