Fixes Usage Quotas Storage tab mobile view cards layout

What does this MR do and why?

Fixes Usage Quotas Storage tab mobile view cards layout

Exploiting Stuff that should Just Work label here 😊

Screenshots or screen recordings

	before	after
mobile
desktop

How to set up and validate locally

Open a Free tier namespace, and go to Settings -> Usage Quotas -> Storage tab

E.g. http://localhost:3000/groups/gitlab-instance/-/usage_quotas#storage-quota-tab

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.