Add released binaries hash

[CodeSandwich]

This is a trusted software, the release page should provide hashes of the artifacts.

[geigerzaehler]

To make the checksums more accesible I’d propose to inline them in the release description. Like

4fddae5d961d4da1bb83f15bc8a2c4a6a34b53878bdd574edfb01fd49cc67d51 *radicle-registry-cli
dccb1cefb42997df0d9f2d035da9acf10c37932bd4f9fbf70f7bc16fee9b4403 *radicle-registry-node

We would need to extend ./scripts/create-release for that.