update changelog

Author: ChiragAgg5k

CHANGELOG.md

@@ -5,6 +5,7 @@
 * Add array-based enum parameters (e.g., `permissions: array<BrowserPermission>`).
 * Breaking change: `Output` enum has been removed; use `ImageFormat` instead.
 * Add `getQueueAudits` support to `Health` service.
+* Add longtext/mediumtext/text/varchar attribute and column helpers to `Databases` and `TablesDB` services.
 
 ## 19.1.0
 
@@ -47,4 +48,4 @@
 * Add `dart38` and `flutter332` support to runtime models
 * Add `gif` support to `ImageFormat` enum
 * Add `upsertDocument` support to `Databases` service
-* Add `sequence` support to `Document` model
+* Add `sequence` support to `Document` model