chore(release): update readme for v3.9.0-beta.2

Author: code-snippets-bot

src/readme.txt

@@ -104,6 +104,30 @@ You can report security bugs found in the source code of this plugin through the
 
 == Changelog ==
 
+
+= 3.9.0-beta.2 (2025-11-10) =
+
+__Added__
+
+* Added 'Snippets' row action to the Network Sites table
+* Introduced network snippets management with subsite menu permission checks
+* Added support for shared network snippets across multisite networks
+
+__Changed__
+
+* Updated browser support targets (.browserslistrc added for modern browsers)
+* Refined badge styling and hover effects for row actions and pro badges
+* Improved snippet name visibility for network users
+* Adjusted badge styles and color usage for network snippets for clearer differentiation
+
+__Fixed__
+
+* Corrected selector for active snippet name styling
+* Fixed status labels for shared network snippets
+* Corrected network condition checks and streamlined snippet fetching logic
+* Handled fatal errors in file-based snippets to prevent crashes
+* Reverted badge line-height to fix visual alignment issues
+
 = 3.8.2 (2025-10-31) =
 
 __Fixed__