GHE Release Notes Link using V3 API

https://github.com/github-tools/github-release-notes/pull/73

While this works, we have an issue wherein all the links in the release notes link using the GHE url followed by `/api/v3`. This means users can't click through to the commit to see the changesets. I will be looking at a way to open a PR request in my free time, but if someone beats me to it go for it. Just wanted to post here in case maybe I set it up wrong.

Read the linked pull request, https://github.com/github-tools/github-release-notes/pull/73, alongside this issue. Investigate why GHE release-note links include `/api/v3`; done means the generated links let users click through to the commits to inspect changesets.

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