Spiff up our bump-version script

We are thinking about additional steps we need to do after bumping the version and
releasing a new version of the CLI. This message ... seemed prudent.
Change links to stable and edge builds

We now use The CLAW as a stable source of links to stable and edge
builds.
This is an advantage over direct linking to S3 because

1. It's easier to update
2. It's less obscure than changing metadata for zero byte files
3. We can share the details of how this works with the community
4. It's easier to understand

ALL HAIL THE CLAW

[Finishes #70725858]