Update 'datacite.yml'

datacite.yml

@@ -1,11 +1,11 @@
 authors:
   -
-    firstname: "David J"
+    firstname: "David J."
     lastname: "Ottenheimer"
     affiliation: "Johns Hopkins University"
     id: "ORCID:0000-0003-4882-1898"
   -
-    firstname: "Bilal A"
+    firstname: "Bilal A."
     lastname: "Bari"
     affiliation: "Johns Hopkins University"
     id: "ORCID:0000-0002-8381-3802"