[Docs] Use Sentry: clarify what type of auth token is needed

[benjaminkomen]

Why

I was confused between organization and user auth token. Unfortunately it is not possible to directly link to the correct page, since it's prefixed with your organization slug.

How

Visit this page during setup of Sentry.

Test Plan

• View the changed documentation page and read the changed text and hopefully understand it

Checklist

• Documentation is up to date to reflect these changes (eg: https://docs.expo.dev and README.md).
• Conforms with the Documentation Writing Style Guide
• This diff will work correctly for npx expo prebuild & EAS Build (eg: updated a module plugin).

[amandeepmittal]

Hi @benjaminkomen, thanks for your contribution!

I agree that the page link does not automatically Sentry's Auth token page for the reason you mentioned. I think we can improve this by mentioning "Organization Auth Token".

Also, adding the link to the Sentry documentation that provides details about Organization Auth Token.