fix: correct metrics notification recipient (#1683)

Author: MarceloRobert

backend/kernelCI/settings.py

@@ -192,7 +192,8 @@ def get_json_env_var(name, default):
             [
                 "notifications",
                 "--action=metrics_summary",
-                "--add-mailing-lists",
+                "--to=kernelci@lists.linux.dev",
+                "--cc=kernelci-results@groups.io",
                 "--send",
                 "--yes",
             ],