Update CITATION.cff

CITATION.cff

@@ -1,14 +1,17 @@
 cff-version: 1.2.0
 message: If you use this software, please cite it as below.
 authors:
-- family-names: Schindler
-  given-names: Falko
-  orcid: https://orcid.org/0009-0003-5359-835X
-- family-names: Trappe
-  given-names: Rodja
-  orcid: https://orcid.org/0009-0009-4735-6227
+  - family-names: Schindler
+    given-names: Falko
+    orcid: https://orcid.org/0009-0003-5359-835X
+  - family-names: Trappe
+    given-names: Rodja
+    orcid: https://orcid.org/0009-0009-4735-6227
 title: 'NiceGUI: Web-based user interfaces with Python. The nice way.'
-version: 2.3.0
-date-released: '2024-10-04'
+version: 2.4.0
+date-released: '2024-10-16'
 url: https://github.com/zauberzeug/nicegui
 doi: 10.5281/zenodo.13889918
+identifiers:
+  - description: DOI for this application's record on Zenodo
+    type: doi