[users] Fix schema to match actual field names

src/modules/users/users.schema.yaml

@@ -46,14 +46,14 @@ properties:
     # Presets
     #
     # TODO: lift up somewhere, since this will return in many modules;
-    #       the type for each field (fullname, loginname) is a
+    #       the type for each field (fullName, loginName) is a
     #       preset-description (value, editable).
     presets:
         type: object
         additionalProperties: false
         properties:
-            fullname: { type: object }
-            loginname: { type: object }
+            fullName: { type: object }
+            loginName: { type: object }
 
 required:
     - defaultGroups