Add another example for illustrating Slurm Array job

[Premas]

What would you like to see added?

The goal is to add an additional example of a Slurm Array job. For example, a potential use case would be to aid UAB researchers in preprocessing multiple input files.
@mdefende suggested a few examples, freesurfer and fmriprep.

[wwarriner]

Candidate here: https://uab-cinl.github.io/preprocessing/fmriprep/fmriprep-scripts/#example-array-job-script

We can either make a link. Use the full URL or a shortened version, make it obvious they are going to another server.

Or we can copy the content, but then their repository needs a license. Related to #708