Add Sven's and Giulia's orcid

Author: Jaro Camphuijsen

CITATION.cff

@@ -36,6 +36,7 @@ authors:
   - given-names: Sven
     family-names: Burg
     name-particle: van der
+    orcid: 'https://orcid.org/0000-0003-1250-6968'
   - given-names: Abby
     family-names: Cabunoc Mayes
   - given-names: Jacalyn
@@ -64,6 +65,7 @@ authors:
     orcid: 'https://orcid.org/0000-0002-8928-7831'
   - given-names: Giulia
     family-names: Crocioni
+    orcid: 'https://orcid.org/0000-0002-0823-0121'
   - given-names: William
     family-names: Close
 identifiers: