Update Source/Documentation/Manual/news.rst

Co-authored-by: Ryan Young <ryan@youngryan.com>

Author: cjakeman

Source/Documentation/Manual/news.rst

@@ -44,6 +44,7 @@ What's been improved
 - Train control system (TCS)
 - Visual effects for steam ejectors
 - Water troughs
+- Screenshot button now plays a camera shutter sound
 - Sound events for gear positions, injectors, fireman etc.
 - Traction braking display
-- Coverage and index in the manual
+- Coverage and index in the manual