Update the app docs with version revert info

[JV0812]

Purpose of this pull request

This pull request is to add information about the revert app version to the apps doc.

Select the type of change

• [ ] Minor Changes - Typos, formatting, slight revisions
• [x] Update Content - Revisions, updating sections
• [ ] New Content - New features, sections, pages, tutorials
• [ ] Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

[Doc] Update docs for app rollback

[JV0812]

Thanks @jpipkin1 , I fixed your comment.

[kimsauce]

Per DL, this will be on hold for at least another week.