Merge branch 'ph/notebookCellsMarkdownVue3SpecFix' into 'master'

Fixes the notebook/cells/markdown_spec Vue 3 failing spec

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/181812



Merged-by: Jose Ivan Vargas <jvargas@gitlab.com>
Approved-by: Jose Ivan Vargas <jvargas@gitlab.com>
Co-authored-by: Phil Hughes <me@iamphill.com>