Use `{% link ... %}` for build errors on invalid links

[ptheywood]

[Link to a document]({% link _collection/name-of-document.md %})
[Link to a post]({% link _posts/2016-07-26-name-of-post.md %})
[Link to a page]({% link news/index.html %})
[Link to a file]({% link /assets/files/doc.pdf %})

One major benefit of using the link or post_url tag is link validation. If the link doesn’t exist, Jekyll won’t build your site. This is a good thing, as it will alert you to a broken link so you can fix it (rather than allowing you to build and deploy a site with broken links).

https://jekyllrb.com/docs/liquid/tags/#link