Increase max_upload_size to fix test_deposit_invalid_tarball[tar.xz] failure on Sid
Looks like .tar.xz files just got slightly larger in Sid (Python 3.10 upgrade?), which makes it go over the limit.
Related to swh/infra/sysadm-environment#4125 (closed)
Migrated from D7525 (view on Phabricator)