build(deps-dev): bump linkinator from 2.4.0 to 2.5.1

Bumps [linkinator](https://github.com/JustinBeckwith/linkinator) from 2.4.0 to 2.5.1.
- [Release notes](https://github.com/JustinBeckwith/linkinator/releases)
- [Commits](JustinBeckwith/linkinator@v2.4.0...v2.5.1)

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]