fix contributor githubs

Author: tlitfin

_data/CONTRIBUTORS.yml

@@ -117,7 +117,7 @@ Cyntia Taveneau:
 
 Charlie Bond:
     affiliation: Professor, The University of Western Australia
-    github: charlie-bond
+    git: charlie-bond
     orcid: 0000-0002-9584-6783
 
 Joel Mackay:
@@ -143,5 +143,5 @@ Begoña Heras:
 
 Fiona Whelan:
     affiliation: Group Leader in Biotechnology, Adelaide University
-    github: fionawhelan
+    git: fionawhelan
     orcid: 0000-0002-0791-6850