(merges !2368) Update RELEASE_NOTES.md

Author: sderonne

RELEASE_NOTES.md

@@ -32,6 +32,8 @@ been tested on Linux. As of this release, the latest known version to work with
 
 ### Bugs fixed
 
+- (wifi) #2368 - Fix various issues related to Content Channels and RU allocation. Fixes mostly covers cases where OFDMA is used with central 26 tones, where a single user is being assigned the whole PPDU bandwidth or where a RU is larger than 20 MHz.
+
 ## Release 3.44
 
 This release adds the zigbee module and otherwise contains maintenance and small feature updates