CI: fix image name

5 jobs for ci_official_registry in 4 minutes and 25 seconds (queued for 1 second)
Status Job ID Name Coverage
  Precheck
passed #2724
fast-build

00:04:25

 
  External
passed cdash:debian-unstable-gcc

passed cdash:otb-centos-superbuild-base

passed cdash:ubuntu-18.04-fast

passed cdash:ubuntu-18.04-fast