chore(readme): add beta publishing section

[ttaylor-stack]

Closes [ISSUE_NUMBER].

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PR Checklist

• All new/changed functionality includes unit and (optionally) e2e tests as appropriate
• All new/changed functions have /** ... */ docs
• I've added the bug/enhancement and other labels as appropriate

Environment(s) tested

• Device: [e.g. desktop, iPhone6, etc.]
• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

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[changeset-bot]

🦋 Changeset detected

Latest commit: 295dbe1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@stackoverflow/stacks-editor	Patch

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