fix(deps): update dependency dompurify to ^2.3.6

mentioned in commit c848e627

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!2722 (merged)

mentioned in merge request status-page!469 (merged)

mentioned in merge request gitlab-docs!2460 (merged)

mentioned in merge request gitlab!81140 (merged)

mentioned in merge request gitlab!81282 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!2732 (merged)

mentioned in merge request status-page!471 (merged)

mentioned in merge request gitlab-docs!2472 (merged)

mentioned in merge request gitlab-docs!2473 (closed)