vidjil-server/Dockerfile use newer GOSU version

use a newer version of GOSU because it doesn't seem to work correctly
with the current setup
3 jobs for <span class="ref-name">feature-s/docker_gosu</span> in 6 minutes and 27 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test Tools
passed #204144
test_tools

00:00:07

 
  Test Unit
passed #204145
web
test_server_unit

00:00:23

 
  Test Functional
passed #204146
docker x86_64
test_server_functional

00:05:57