How to safely upgrade Bun and roll back to a previous version

When managing a Bun installation in a development or production environment, what are the recommended steps to upgrade to a new stable or canary release while ensuring the ability to verify the update and roll back to a known good version if issues arise? Please outline any verification commands, version‑checking procedures, and rollback strategies that are documented or commonly used with Bun. Include considerations for checking the current version before and after the upgrade, and describe how to revert to the previous Bun binary if the new release causes failures.