Note: the draft release notes for the next release can be found
[here on GitHub](https://github.com/elves/elvish/blob/master/0.16.0-release-notes.md).

The draft release notes for the next release can be found
[here on GitHub](https://github.com/elves/elvish/blob/master/0.17.0-release-notes.md).

Fix link to release notes of the next version.
website/blog: Fix link to release notes of the next version.
