Update CITATION.cff

Signed-off-by: Ryan <[email protected]>

Author: ryanlua

CITATION.cff

@@ -3,13 +3,9 @@ message: "If you use this software's code or assets, please cite it as below."
 authors:
 - family-names: "Luu"
   given-names: "Ryan"
+  orcid: "https://orcid.org/1234-5678-9101-1121"
 title: "Signs"
-version: 1.0.0
+version: 2.0.0
 doi: 10.5281/zenodo.1234
 date-released: 2023-01-12
 url: "https://github.com/RyanLua/Signs"
-preferred-citation:
-  type: software
-  authors:
-  - family-names: "Luu"
-    given-names: "Ryan"