Merge branch '59026-replace-favicon' into 'master'

Add new favicon for canary from next.gitlab.com

Closes #59026

See merge request gitlab-org/gitlab-ce!28601

changelogs/unreleased/59026-replace-favicon.yml

+---
+title: Update favicon from next
+merge_request: 28601
+author: Jarek Ostrowski @jareko
+type: fixed