chore(deps): update dependency linkinator to v4

This MR contains the following updates:

Package	Type	Update	Change	Pending
linkinator	devDependencies	major	^3.1.0 -> ^4.0.1	4.0.2

MR created with the help of gitlab-org/frontend/renovate-gitlab-bot

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Release Notes

JustinBeckwith/linkinator

v4.0.1

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Bug Fixes

• properly parse srcset attribute (#​510) (9a8a83c)

v4.0.0

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Features

• create new release with notes (#​508) (2cab633)

BREAKING CHANGES

• The commits in #​507 and #​506 both had breaking changes. They included dropping support for Node.js 12.x and updating the CSV export to be streaming, and to use a new way of writing the CSV file. This is an empty to commit using the BREAKING CHANGE format in the commit message to ensure a release is triggered.

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