client: Fix url to update metadata on deposit with status 'done'
Fix regression introduced by the split between the EDIT and SE IRIs:
From PUT /1/swh/37/metadata/
to PUT /1/swh/37/atom/
.
This passed unseen as this part is the one part still mocked (justifiably).
Related to #2929 (closed)
Test Plan
tox
Migrated from D4808 (view on Phabricator)