Copter: 3.6.11 release notes

ArduCopter/ReleaseNotes.txt

@@ -1,6 +1,6 @@
 ArduPilot Copter Release Notes:
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-Copter 3.6.11-rc1 16-Sep-2019
+Copter 3.6.11 01-Oct-2019 / 3.6.11-rc1 16-Sep-2019
 Changes from 3.6.10
 1) EKF and IMU improvements:
     a) IMU3 enabled by default if present
@@ -19,6 +19,7 @@ Changes from 3.6.10
     c) IO firmware fix involving delayed writes to serial ports (ChibiOS only)
     d) CAN Compass fis to for unintialised device IDs
     e) mRo x2.1-777 USB ID fix
+    f) ChibiOS fix for I2C storm
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 Copter 3.6.10 29-Jul-2019 / 3.6.10-rc2 2-Jul-2019
 Changes from 3.6.10-rc1