ibexa-user-users.raml: Fix typo

Author: adriendupuis

docs/api/rest_api/rest_api_reference/input/ibexa-user-users.raml

@@ -33,7 +33,7 @@ get:
                 application/vnd.ibexa.api.UserRefList+json:
                     type: UserRefListWrapper
         404:
-            description: If there are no visibile Users matching the filter.
+            description: If there are no visible Users matching the filter.
 head:
     displayName: Verify Users
     description: Verifies if there are Users matching given filter.