example.cpp: Fix indentation

3 jobs for master in 1 second
Status Job ID Name Coverage
  Build
failed #673
build

00:00:01

 
  Test
skipped #675
allowed to fail
code_quality
skipped #674
test
 
Name Stage Failure
failed
build Build
Cloning into '/home/gitlab-runner/builds/48656cfd/0/herzi/project/bob3/libbob3'...
Checking out 7148802c as master...
Skipping Git submodules setup
$ # Auto DevOps variables and functions # collapsed multi-line command
$ setup_docker
$ build
Logging to GitLab Container Registry with CI credentials...
main: line 84: docker: command not found
ERROR: Job failed: exit status 1