Added forgotten changelog entry

Author: Wohlstand

README.md

@@ -166,7 +166,8 @@ To remove MIDI Sequencer, define `OPNMIDI_DISABLE_MIDI_SEQUENCER` macro and remo
 # Changelog
 ## 1.6.1   dev
  * Added four extra heavy but very accurate Nuked LLE emulators (on weak machines suitable for WAV writing only).
- * WinMM: Fixed random crash on waveOutOpen initialisation because of incorrect initialisation structure usage
+ * WinMM: Fixed random crash on waveOutOpen initialisation because of incorrect initialisation structure usage.
+ * Fixed crash when playing too many notes at the same channel.
 
 ## 1.6.0   2025-07-05
  * Fixed the work on big endian processors