Update staging URL in Connect_to_Rails_Console_via_Teleport.md
This MR adapts the instructions to connect to the staging Rails console due to the changes in https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/10428/diffs.
This MR adapts the instructions to connect to the staging Rails console due to the changes in https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/10428/diffs.