Update spec_clusters.md (#36850)

Fix script reference

Author: lboue

docs/ids_and_codes/spec_clusters.md

@@ -1,5 +1,5 @@
 # List of currently defined spec clusters
-This file was **AUTOMATICALLY** generated by `python scripts/generate_spec_xml.py`. DO NOT EDIT BY HAND!
+This file was **AUTOMATICALLY** generated. Refer to this page: [data_model](/data_model/README.md). DO NOT EDIT BY HAND!
 
 | ID (Decimal) | ID (hex) | Name                                                     |
 |--------------|----------|----------------------------------------------------------|