Update news

Author: wch

NEWS.md

@@ -10,7 +10,9 @@
 
 * Shiny's CSS styling (for things like `showNotification()`, `withProgress()`, `inputPanel()`, etc.), has been updated with `{bslib}`'s upcoming CSS-only dark mode feature in mind. (#3882, #3914)
 
-* Default styles for `showNotification()` were tweaked slightly to improve accessibility, sizing, and padding. (#3913) 
+* Default styles for `showNotification()` were tweaked slightly to improve accessibility, sizing, and padding. (#3913)
+
+* For `InputBinding`s, the `.receiveMessage()` method can now be asynchronous or synchronous (previously it could only be synchronous). (#3930)
 
 ## Bug fixes