Follow-up to #6977
Dependabot started failing after this because it was looking for all of
the relative includes that were inside of
`.github/project-root-duplicates/settings.gradle.kts`.
The solution that seems to work (I've tested on my fork) is to split
those includes out into a separate file, and `apply` that file.
Also fixes a busted markdown link (probably should have sent that in a
separate PR).
Resolves#6989
Trask Stalnaker