Fix rake db:migrate:status typo in docs
What does this MR do?
Corrects typo, changes non-working gitlab-rake db:migrations:status
command to working db:migrate:status
In my attempt to close https://gitlab.com/gitlab-org/gitlab-ce/issues/63908 with https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/30202 , I introduced a typographical error affecting the command instruction itself.
The correct db:migrate:status
command is referred to everywhere other than the code block.
This fixes the typographical error to prevent confusion and unexpected errors on the command line.