feat(Badge): increase-muted-contrast

mentioned in commit da39e1d8

mentioned in merge request gitlab-org/frontend/pajamas-adoption-scanner!89 (merged)

mentioned in merge request gitlab!103040 (merged)

mentioned in merge request status-page!634 (merged)

mentioned in merge request gitlab-docs!3249 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!3124 (merged)

mentioned in merge request gitlab!103662 (merged)