Adjusts pre enforcement banner to include dashboard limit

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138044



Merged-by: Suraj Tripathi <stripathi@gitlab.com>
Approved-by: Mohamed Hamda <mhamda@gitlab.com>
Approved-by: Suraj Tripathi <stripathi@gitlab.com>
Approved-by: Richard Chong <rchong@gitlab.com>
Reviewed-by: Mohamed Hamda <mhamda@gitlab.com>
Co-authored-by: Vijay Hawoldar <vhawoldar@gitlab.com>