docs: add DESm1th as a contributor

[allcontributors]

Adds @DESm1th as a contributor for code, doc, design, ideas, infra, maintenance, question, review, test, talk.

This was requested by josephmje in this comment

[welcome]

Thanks for opening this pull request! We have detected this is the first time for you to contribute to datman. Please check out our contributing guidelines.
We invite you to list yourself as a datman contributor, so if your name is not already mentioned, please modify the .zenodo.json file and insert your data last in the contributors list. Example:

{
   "name": "Contributor, New datman",
   "affiliation": "Department of na na na datman'ing, Open Science Made-Up University",
   "orcid": "<your id>",
   "type": "Researcher"
}

Of course, if you want to opt-out this time there is no problem at all with adding your name later. You will be always welcome to add it in the future whenever you feel it should be listed.

[DESm1th]

Really cool! Thanks for setting this up Mike!