update nrfx to 1.6.2

README.md

@@ -24,6 +24,7 @@ TinyUSB is an open-source cross-platform USB Host/Device stack for embedded syst
 - Human Interface Device (HID): Keyboard, Mouse, Generic
 - Communication Class (CDC)
 - Mass Storage Class (MSC)
+- Musical Instrument Digital Interface (MIDI)
 
 ## Host Stack
 

hw/mcu/nordic/nrfx

@@ -1 +1 @@
-Subproject commit 67710e47c7313cc56a15748e485079831ee6a3af
+Subproject commit 6f54f689e9555ea18f9aca87caf44a3419e5dd7a