Update changelog.mdx

Author: chkn

api-reference/v2/resources/changelog.mdx

@@ -3,6 +3,10 @@ title: Glide API Changelog
 sidebarTitle: Changelog
 ---
 
+### November 26, 2024
+
+- Added a warning that using the `PUT /tables` endpoint to overwrite a table will clear user-specific columns.
+
 ### November 21, 2024
 
 - Introduced `HEAD /tables/{tableID}/rows` endpoint to retrieve the current version of table data via `ETag` header.