message: Update the published JOSS information.
diff: @@ -23,11 +23,14 @@ The Ginkgo software itself was reviewed and has a paper published in the Journal
  of Open Source Software, which can be cited with the following reference:
  ```bibtex
  -@article{Joss2020,
  - doi = {10.21105.joss.02260},
  +@article{GinkgoJoss2020,
  + doi = {10.21105/joss.02260},
  url = {https://doi.org/10.21105/joss.02260},
  year = {2020},
  publisher = {The Open Journal},
  + volume = {5},
  + number = {52},
  + pages = {2260},
  author = {Hartwig Anzt and Terry Cojean and Yen-Chen Chen and Goran Flegar and Fritz G\"{o}bel and Thomas Gr\"{u}tzmacher and Pratik Nayak and Tobias Ribizel and Yu-Hsiang Tsai},
  title = {Ginkgo: A high performance numerical linear algebra library},
  journal = {Journal of Open Source Software}
  