CI: `host` job doesn't depend on success of custom build jobs

It's not clear if this is intentional behaviour or not, but the condition for the `host` GitHub Actions job does not depend on the outcome of any custom build jobs:

https://github.com/axodotdev/cargo-dist/blob/5e7826f7b09a64e5ba9edc16dab8cee7b13daa27/cargo-dist/templates/ci/github_ci.yml.j2#L392-L394

Start with cargo-dist/templates/ci/github_ci.yml.j2 at lines 392-394 and inspect how the host job condition relates to custom build jobs. Confirm whether host should wait for and reflect those jobs' outcomes; done means the dependency behavior is intentional or corrected and the generated GitHub Actions workflow validates it.

Written by the indexing model from the issue text.