[update] Whats new before release v1.6.3

Author: serhiipylypchuk1991

docs/news/whats_new.md

@@ -8,6 +8,19 @@ description: You can explore what's new in DHTMLX Kanban and its release history
 
 If you are updating Kanban from an older version, check [Migration to newer versions](news/migration.md) for details.
 
+## Version 1.6.3
+
+Released on April 8, 2025
+
+### Fixes
+
+- Limit applies to the whole column incorrectly
+- Error occurs when moving a card after modal editor close
+- Confirm for deletion is shown below the modal editor
+- Toolbar "more" icon appears then disappears unexpectedly during slow window resizing
+- The `delete-card` event always closes the editor
+- The editor cannot be opened if the priority is set to ID outside of provided options
+
 ## Version 1.6.2
 
 Released on February 14, 2025