docs: fix table header on Snowflake page

Author: hassankhan

docs/docs-new/pages/product/configuration/data-sources/snowflake.mdx

@@ -189,3 +189,5 @@ connections are made over HTTPS.
   https://docs.snowflake.com/en/sql-reference/functions/approx_count_distinct.html
 [snowflake-docs-warehouse]:
   https://docs.snowflake.com/en/user-guide/warehouses.html
+[ref-config-multiple-ds-decorating-env]:
+  /product/configuration/advanced/multiple-data-sources#configuring-data-sources-with-environment-variables-decorated-environment-variables