Update docs to reflect semver changes.

Updating docs to reflect changes made here: dev/release#1 (comment 2843)

Created by: totten

Thanks, @MikeyMJCO. This is good to document.

I'd forgotten there was a revision table at the top of the document -- glad you found both spots.

I pushed up a change - mainly replacing the phrase "to bridge this change" (07240a6f) because we're in a new context.