chore(release): update readme for v3.9.0

Author: code-snippets-bot

src/readme.txt

@@ -104,6 +104,23 @@ You can report security bugs found in the source code of this plugin through the
 
 == Changelog ==
 
+
+= 3.9.0 (2025-11-13) =
+
+__Added__
+
+* Added contextual notices in the Snippets list table to surface action results and warnings in the UI
+* Expanded Multisite Sharing settings for clearer control over network-wide snippet sharing
+
+__Changed__
+
+* Modernized browser support targets and polished admin UI (clearer row-action badges, improved Pro badge hover, refined active snippet name styling)
+
+__Fixed__
+
+* Fixed REST API pagination to return correct results and page counts
+* Resolved styling selector so the active snippet name highlights reliably
+
 = 3.8.2 (2025-10-31) =
 
 __Fixed__