adjust citation

Author: melonora

CITATION.cff

@@ -1,15 +1,19 @@
 cff-version: 1.2.0
 message: "If you use this software, please cite it as below."
 
-title: "xarray-dataclasses"
+title: "xarray-dataclass"
 abstract: "xarray data creation by data classes"
 version: 1.9.1
 date-released: 2024-12-09
 license: "MIT"
 doi: "10.5281/zenodo.4624819"
-url: "https://github.com/astropenguin/xarray-dataclasses"
+url: "https://github.com/xarray-contrib/xarray-dataclass"
 authors:
   - given-names: "Akio"
     family-names: "Taniguchi"
     affiliation: "Nagoya University"
     orcid: "https://orcid.org/0000-0002-9695-6183"
+  - given-names: "Wouter-Michiel Vierdag"
+    family-names: "Vierdag"
+    affiliation: "European Molecular Biology Laboratory"
+    orcid: "https://orcid.org/0000-0003-1666-5421"