Merge branch 'msj-boards-tutorial-link' into 'master'

Improve issue boards tutorial

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/120772



Merged-by: Kati Paizee <kpaizee@gitlab.com>
Approved-by: Kati Paizee <kpaizee@gitlab.com>
Co-authored-by: Marcin Sedlak-Jakubowski <msedlakjakubowski@gitlab.com>