Make the trigger commands compatible with older PostgreSQL versions

schema/versions/72cee10f1f0d_add_created_updated_timestamps_to_.py

@@ -68,14 +68,14 @@ def upgrade():
         """
     create trigger capability_request_updated 
     before update on capability_requests
-    for each row execute function update_updated_at_timestamp();"""
+    for each row execute procedure update_updated_at_timestamp();"""
     )
 
     op.execute(
         """
     create trigger workflow_request_updated 
     before update on workflow_requests
-    for each row execute function update_updated_at_timestamp();"""
+    for each row execute procedure update_updated_at_timestamp();"""
     )