Merge branch 'aqualls-clarify-reference-links' into 'master'

Clarify that reference-style links aren't ok

See merge request gitlab-org/gitlab!67422

doc/development/documentation/styleguide/index.md

@@ -839,7 +839,7 @@ We include guidance for links in these categories:
 ### Basic link criteria
 
 - Use inline link Markdown markup `[Text](https://example.com)`.
-  It's easier to read, review, and maintain. _Do not_ use `[Text][identifier]`.
+  It's easier to read, review, and maintain. _Do not_ use `[Text][identifier]` reference-style links.
 
 - Use [meaningful anchor texts](https://www.futurehosting.com/blog/links-should-have-meaningful-anchor-text-heres-why/).
   For example, instead of writing something like `Read more about GitLab Issue Boards [here](LINK)`,