Use camel case for certificate authority definition

features_capability.json

@@ -27,7 +27,7 @@
     "stable": {"min": "21.02-ALPHA"},
     "nightlies": {"min": "21.02-MASTER"}
   },
-  "definitions/certificate_authority": {
+  "definitions/certificateAuthority": {
     "stable": {"min": "21.02-ALPHA"},
     "nightlies": {"min": "21.02-MASTER"}
   }