chore(release): update readme for v3.8.1

Author: code-snippets-bot

src/readme.txt

@@ -107,6 +107,18 @@ You can report security bugs found in the source code of this plugin through the
 
 
 
+
+= 3.8.1 (2025-10-28) =
+
+__Changed__
+
+* Improved file-based snippet handling for multisite installations to correctly map snippets to their site/table during flat-file sync.
+
+__Fixed__
+
+* Fixed multisite flat-file synchronization that could skip or mis-handle active snippets due to incorrect nested iteration.
+* Ensured correct table detection when processing active snippets so they are written to the correct location on multisite setups.
+
 = 3.8.0 (2025-10-24) =
 
 __Added__