Update deployment providers (#1272)

docs/advanced-concepts.md

@@ -10,7 +10,7 @@ sidebar_position: 2
 
 There are a variety of ways to host your Spectacle presentation.
 
-1. If you are integrating this lib yourself, take your build and follow the linked instructions from any of (but not limited to) the following providers: [Heroku](https://devcenter.heroku.com/articles/git#deploying-code), [Zeit](https://zeit.co/docs/v2/platform/deployments), or [Surge](https://surge.sh/help/deploying-continuously-using-git-hooks).
+1. If you are integrating this lib yourself, take your build and follow the linked instructions from any of (but not limited to) the following providers: [Netlify](https://docs.netlify.com/get-started/#deploy-a-project-to-netlify), [Vercel](https://vercel.com/docs/concepts/deployments/overview), or [Surge](https://surge.sh/help/deploying-continuously-using-git-hooks).
 
 2. If using `spectacle-cli` (either `spectacle --action build` or `spectacle-boilerplate` with `yarn clean && yarn build`) your output is `dist/` and upload that directory to any of the above static hosting providers.