Dashboard: replace hardcoded groupname with groupname variable

[gael-o0o]

A little PR for replacing hard-coded group names with the group name variables defined.

Without this modification, we can't deploy dashboard with our global dynamic inventory.

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in two weeks if no further activity occurs. Thank you for your contributions.

[guits]

you shouldn't submit PRs against stable branches directly

[github-actions[bot]]

This pull request has been automatically closed due to inactivity. Please re-open if these changes are still required.