Michele Giornetta

The import link provided in the README file was not working. The correct tag to use is **0.4.0** (without the _v_).

This MR upgrades goreleaser to v2 and goreleaser-action to v6, since we were using very old versions. Moreover, it changes our workflow behavior to publish a PR against github.com/civo/homebrew-tools instead...

We recently released a new version of the CLI that failed to be released because of an integer overflow error when building on `linux_386` architecture: https://github.com/civo/cli/issues/570