Update relnotes.txt

Author: moodeaudio

www/relnotes.txt

@@ -20,6 +20,7 @@ Updates
 - UPD: Add cover art and metadata display for Spotify Connect
 - UPD: Add section to Quick help explaining date tags in the Library
 - UPD: Add support for Pi 7 inch Touch screen 2
+- UPD: Add HDMI screen orientation option to Peripheral Config
 - UPD: Remove AP fallback option for Spotify Connect (not needed for >= v0.5.x)
 
 Bug fixes