[Question] Updating a Tutorial on Wiki

So, I want to update a tutorial on the Essentials Wiki, specifically this one. If I do that, do I make a new tutorial or do I update the page and add myself to the contributors?
I just ask because I don't want to mess up.
Thank you.

Depends how you're updating it. If you're just changing the names of script sections to make sure they're up to date (or things like that, where the essence of the tutorial remains the same), just edit the tutorial. If you're adding new functionality, it depends how extensive your additional functionality is.