Clarify on-prem vs. cloud instructions for GitHub Enterprise

[cstavitsky]

Pre-merge checklist

If you work at Sentry, you're able to merge your own PR without review, but please don't unless there's a good reason.

• Checked Vercel preview for correctness, including links
• PR was reviewed and approved by any necessary SMEs
• PR was reviewed and approved by a member of the Sentry docs team

Description of changes

Resolves #8665

[vercel]

@cstavitsky is attempting to deploy a commit to the Sentry Team on Vercel.

A member of the Team first needs to authorize it.

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Name	Status	Preview	Comments	Updated (UTC)
sentry-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Feb 16, 2024 0:17am

[vivianyentran]

Just wanted to follow up on this PR as it's still in draft form. Wondering if you're waiting on anything else before merging this?

[cstavitsky]

Just wanted to follow up on this PR as it's still in draft form. Wondering if you're waiting on anything else before merging this?

Yes, going to see if an engineer who works on integrations can give this a review as well. Following up on that now, will promote from draft to a real PR, but please hold off on merging til I can get an approval there as well

[schew2381]

lgtm

[cstavitsky]

@vivianyentran I think we're good to get this merged 👍 Thanks again @schew2381 for the review!

[vivianyentran]

sounds good! will go ahead and merge this in!