Additional step needed in deleting OAuth App doc

[docs-bot]

What article on docs.github.com is affected?

https://docs.github.com/en/developers/apps/deleting-an-oauth-app

What part(s) of the article would you like to see updated?

Between steps 4 and 5 there is another step. The Delete application button exists on the Advanced tab, not the default, General tab, so users need to navigate there to see it.