Tweak verification message (again)

2 jobs for master in 2 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #446
test

00:00:02

 
  Build
skipped #447
build
 
Name Stage Failure
failed
test Test
   242fb63..f6ce5d1  master     -> origin/master
Checking out f6ce5d1f as master...
Skipping Git submodules setup
Checking cache for default...
time="2020-03-27T18:00:34+08:00" level=error msg="Docker executor: prebuilt image helpers will be loaded from /var/lib/gitlab-runner."
Successfully extracted cache
$ rustc --version
bash: line 78: rustc: command not found
ERROR: Job failed: exit status 1