chore(isthmus): fix yaml for custom udf

ZorinAnton · ZorinAnton · commit 6ba115f4cee6 · 2025-10-14T11:36:03.000+02:00
diff --git a/isthmus/src/test/resources/extensions/scalar_functions_custom.yaml b/isthmus/src/test/resources/extensions/scalar_functions_custom.yaml
@@ -1,5 +1,6 @@
 %YAML 1.2
 ---
+urn: extension:substrait:functions_custom
 scalar_functions:
   - name: "regexp_extract"
     impls:
