Wrong DOI in citation.cff

[stefanbringuier]

Minor detail but was adding TorchSim reference to my bib and noticed the DOI entry doi: 10.5281/zenodo.7486816 in citation.cff seems to be for pymatviz.

[CompRhys]

thanks for catching this! There is suppose to be a preprint coming fairly soon so will update it once it's posted