Takashi NATSUME b244a02730 doc: Fix a broken reference link
Fix a broken reference link in
contributor/testing/zero-downtime-upgrade.rst

Change-Id: I1c0054175f9d665fecd76a03466663177c49f774
Closes-Bug: #1842985
2019-09-09 07:58:38 +09:00
..
2019-04-05 13:57:49 -04:00