📝 add note about future SDK team

[JoshuaTheMiller]

Why:

There has been some concern across communities regarding the Warning on the GitHub API Library page (the text being modified by this PR).

References (not closes): #14926
References: octokit/octokit.js#620

What's being changed:

This adds some detail and a link around the future of the SDK teams and a link to an official announcement.

Check off the following:

• I have reviewed my changes in staging (look for "Automatically generated comment" and click Modified to view your latest changes).

• For content changes, I have completed the self-review checklist.

Writer impact (This section is for GitHub staff members only):

• This pull request impacts the contribution experience
  • I have added the 'writer impact' label
  • I have added a description and/or a video demo of the changes below (e.g. a "before and after video")

[welcome]

Thanks for opening this pull request! A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[github-actions]

Automatically generated comment ℹ️

This comment is automatically generated and will be overwritten every time changes are committed to this branch.

The table contains an overview of files in the content directory that have been changed in this pull request. It's provided to make it easy to review your changes on the staging site. Please note that changes to the data directory will not show up in this table.

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Content directory changes

You may find it useful to copy this table into the pull request summary. There you can edit it to share links to important articles or changes and to give a high-level overview of how the changes in your pull request support the overall goals of the pull request.

Source	Preview	Production	What Changed
content/rest/overview/libraries.md	Modified	Original

[JoshuaTheMiller]

My original wording is admittedly a bit on the cheesy side, but I wanted to get this ball rolling. Please don't hesitate to suggest alternatives if the basis of this change seems valid!

[ramyaparimi]

@JoshuaTheMiller
Thanks so much for opening a PR! I'll get this triaged for review ⚡

[skedwards88]

Thanks for adding this additional reference! I'm going to modify the wording to fit the docs style, then we'll get this merged down for you.

[github-actions]

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