The number of columns should never be less than 1, otherwise we can
break the script such as:
```
Traceback (most recent call last):
File "/var/home/guilherme/projects/mesa/bin/ci/ci_run_n_monitor.py", line 734, in <module>
main()
File "/var/home/guilherme/projects/mesa/bin/ci/ci_run_n_monitor.py", line 713, in main
target_job_id, ret, exec_t = monitor_pipeline(
^^^^^^^^^^^^^^^^^
File "/var/home/guilherme/projects/mesa/bin/ci/ci_run_n_monitor.py", line 221, in monitor_pipeline
cancel_jobs(project, to_cancel)
File "/var/home/guilherme/projects/mesa/bin/ci/ci_run_n_monitor.py", line 400, in cancel_jobs
print_formatted_list(cancelled_jobs, indentation=8)
File "/var/home/guilherme/projects/mesa/bin/ci/gitlab_gql.py", line 373, in print_formatted_list
step = (len(elements) // n_columns) + 1
~~~~~~~~~~~~~~^^~~~~~~~~~~
ZeroDivisionError: integer division or modulo by zero
```
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35250>
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