Clearer documentation for GitHub Enterprise

[geotrev]

Hello there,

I'm using release-it on GH Enterprise and noticed there isn't very clear documentation on how to set a configuration for it.

My GHE instance uses a non-github URL, so based on the sourcecode, would this be correct?

{
  "release-it": {
    "github": {
      "host": "private.source.com"
    }
  }
}

Which results in https://private.source.com/api/v3.

If this looks right, I'm happy to make a PR that specifies the right keys in the README or github release doc. Right now there's no mention of them as far as I can tell, except by source code and looking at the base config schema in config/.release-it.json.

Thanks!

[webpro]

Just added 6d7c3f2

Does this help? Happy to receive a PR for anything else that's not clear :)

[geotrev]

That's great, thank you!