Merge branch '479704-model-registry-allow-editing-model-version-descriptions' into 'master'

Model registry: Edit model version graphql mutation

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/163132



Merged-by: Madelein van Niekerk <mvanniekerk@gitlab.com>
Approved-by: Ian Anderson <ianderson@gitlab.com>
Approved-by: Madelein van Niekerk <mvanniekerk@gitlab.com>
Reviewed-by: Ian Anderson <ianderson@gitlab.com>
Reviewed-by: Fred de Gier <fdegier@gitlab.com>
Reviewed-by: Madelein van Niekerk <mvanniekerk@gitlab.com>
Co-authored-by: fdegier <fdegier@gitlab.com>