Scala CLI tries to download scala-cli binaries from scala-cli/scala-cli-signing and fails, during 'scala-cli publish setup'

[alexarchambault]

Version(s)
1.0.0-RC1

Describe the bug
When running scala-cli publish setup --ci on a new Scala CLI project, it seems it tries to download binaries from scala-cli/scala-cli-signing, and fails, as these seem to now live in VirtusLab/scala-cli-signing.

To Reproduce
On a new project, run scala-cli publish setup --ci </dev/null. It should print lines like

Downloading https://github.com/scala-cli/scala-cli-signing/releases/download/v0.1.16/scala-cli-signing-x86_64-apple-darwin.gz
Downloaded https://github.com/scala-cli/scala-cli-signing/releases/download/v0.1.16/scala-cli-signing-x86_64-apple-darwin.gz

(Note that the Downloaded from the coursier logger is misleading, the download actually failed.)

Expected behaviour
Scala CLI should download scala-cli-signing binaries from VirtusLab/scala-cli-signing for scala-cli-signing versions >= 0.1.15 (and keep using scala-cli/scala-cli-signing for lower versions).