Fixes#23897 (docs link only — naming rename is in #23905)
- Fix version stripping logic in both Go (`codersdk/deployment.go`) and
TypeScript (`site/src/utils/docs.ts`) to preserve `-rc.X` suffixes
instead of amputating them along with `-devel`
- Add `v0.0.0` fallback in the TS frontend to match Go backend behavior
for dev builds
- Add tests covering RC, devel, and plain release version strings
> 🤖 Written by a Coder Agent. Will be reviewed by a human.