updated instructions on GH OAuth customization (#425)

Author: torresmateo

pages/home/auth-providers/github.mdx

@@ -33,11 +33,12 @@ Before showing how to configure your GitHub app credentials, let's go through th
 
 ### Create a GitHub app
 
-- Follow GitHub's guide to [registering a GitHub app](https://docs.github.com/en/apps/creating-github-apps/registering-a-github-app/registering-a-github-app)
+- Follow GitHub's guide to [registering a GitHub app](https://docs.github.com/en/apps/creating-github-apps/registering-a-github-app/registering-a-github-app). Make sure to use the "GitHub App" type, which [provides more granular permissions control compared to the "OAuth App" type](https://docs.github.com/en/apps/oauth-apps/building-oauth-apps/differences-between-github-apps-and-oauth-apps).
 - Choose the permissions you need for your app
   - At a minimum, you must enable read-only access to the Account > Email addresses permission
   - To access repo data, you must enable at least the Repository > Contents permission
 - Set the redirect URL to: `https://cloud.arcade.dev/api/v1/oauth/callback`
+- Leave "Expire user authorization tokens" **checked**
 - Leave "Request user authorization (OAuth) during installation" **unchecked**
 - Leave "Setup URL" blank and "Redirect on update" **unchecked**
 - Ensure Optional features > User-to-server token expiration is enabled