Fix up validator

validator.py

@@ -100,7 +100,7 @@ def is_device_deprecated(device_codename, version, devices):
 
 
 def is_device_version_deprecated_by_maintainer(device_codename, version, lead, core, maintainers):
-    for roles in [maintainers, [lead]]:
+    for roles in [core, maintainers, [lead]]:
         for member in roles:
             for member_device in member["devices"]:
                 if member_device["codename"] == device_codename and version in member_device["versions"]: