Updated Firmware 12.1.0 (markdown)

Firmware-12.1.0.md

@@ -15,4 +15,9 @@ The Switch 12.1.0 system update was released on July 6, 2021
 - There were no sysmodule IPC changes.
 __Atmosphere is not working at the moment, it will need an update__
 
+# Bluetooth
+
+- The func for DisableBluetooth was updated. Two funcs which handle FatalReason no longer clear a global state field.
+- The remaining changes fixed IPC cmd vulns.
+
 This page will be updated as new information becomes available