deno upgrade from rc to canary doesn't work when both versions the same

[dsherret]

> deno upgrade rc
Current Deno version: v2.3.0-rc.2+326fd3a
Looking up release candidate version

Found latest release candidate version v2.3.0-rc.2

Downloading https://dl.deno.land/release/v2.3.0-rc.2/deno-x86_64-pc-windows-msvc.zip
Deno is upgrading to version 2.3.0-rc.2

Upgraded successfully to Deno v2.3.0-rc.2 (release candidate)
> deno upgrade canary
Current Deno version: v2.3.0-rc.2
Looking up canary version

Local deno version 326fd3a20b86350bb824999610ab0708e98b1cea is the most recent release

V:\scratch
> deno -v
deno 2.3.0-rc.2