Rover: 4.2.0-rc1 release notes

Rover/release-notes.txt

@@ -1,5 +1,18 @@
 Rover Release Notes:
 ------------------------------------------------------------------
+Rover 4.2.0-rc1 10-Apr-2022
+Changes from 4.2.0-beta3
+1) Minor Enhancements
+    a) Log and monitor threads stack size increased
+    b) SPro H7 Extreme QSPI support improved
+2) Bug fixes
+    a) EKF3 accel bias fixed when an IMU is disabled
+    b) MatekH743 buzzer fixed by reverting to 16 bit timer
+    c) STM32 H7 flash storage bug fixed that caused re-init on overflow
+    d) @SYS file logging fixed
+    e) Timer bug fixed that could cause a watchdog on boards using flash storage
+    f) UART driver incorrect lock class fixed
+------------------------------------------------------------------
 Rover 4.2.0-beta3 30-Mar-2022
 Changes from 4.2.0-beta2
 1) Minor Enhancements