Pull Request title: Fix CITATION.cff and add automatic validation of your citation metadata
Hello!
We noticed that your CITATION.cff had a small issue and fixed it.
In addition to the fix, this Pull Request automates validation of that file using the cffconvert GitHub Action. That way, it's a little bit easier to be robust against future changes to the CITATION.cff file.
BTW it's perfectly fine if you don't feel like accepting this Pull Request for whatever reason -- we just thought it might be helpful is all.
We found your repository using a partially automated workflow; if you have any questions about that, feel free to create an issue over at https://github.com/cffbots/filtering/issues/
On behalf of the cffbots team, @abelsiqueira / @fdiblen / @jspaaks