Incorrect provider_url configuration for swmath on staging deposit

swmath has two accounts:

swh-deposit=> select * from deposit_client where user_ptr_id in (16, 17);
 user_ptr_id | collections |        provider_url        |   domain   
-------------+-------------+----------------------------+------------
          16 | {14}        | https://staging.swmath.org | swmath.org
          17 | {14}        | https://staging.swmath.org | swmath.org

And for both, the provider_url is missing a trailing slash, which means they can deposit to other domains than their own, eg. https://staging.swmath.org.example.com/foo`