newsletter: Update note about bookmark folders

The original PR did not support creating folders, but that support does
now exist.

Author: trflynn89

src/content/newsletters/2026-03-31.mdx

@@ -24,7 +24,7 @@ With the old pipeline out of the way, we were able to clean up compatibility shi
 
 ### Bookmarks
 
-Ladybird now has persistent bookmarks ([#8589](https://github.com/LadybirdBrowser/ladybird/pull/8589)). You can bookmark pages, manage them through the application menu, and they persist across sessions in a JSON-backed store. Both the Qt and AppKit UIs have bookmark menus and toolbar integration. Folder support is in the model but not yet exposed in the UI.
+Ladybird now has persistent bookmarks ([#8589](https://github.com/LadybirdBrowser/ladybird/pull/8589), [#8715](https://github.com/LadybirdBrowser/ladybird/pull/8715)). You can bookmark pages, manage them through the application and context menus, and they persist across sessions in a JSON-backed store. Both the Qt and AppKit UIs have bookmark menus and toolbar integration.
 
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