Add note about feature

Author: juliakm

docs/pipelines/process/includes/parameter-data-types.md

@@ -8,6 +8,9 @@ ms.date: 08/30/2024
 ai-usage: ai-assisted
 ---
 
+> [!IMPORTANT]
+>  The new stringList data type feature will roll out over the next month. 
+
 | Data type | Notes |
 |-----------|-------|
 | `string` | string