Document change for #692

Author: terrillmoore

README.md

@@ -1242,6 +1242,7 @@ function uflt12f(rawUflt12)
 
 - HEAD contains the following changes
   - Adapt ttn-otaa-network-time example to be compatible with [PaulStoffregen/Time](https://github.com/PaulStoffregen/Time) v1.6.1, which deletes `Time.h` in favor of `TimeLib.h` [#763](https://github.com/mcci-catena/arduino-lmic/issues/763). Version is v4.0.1-pre1.
+  - Add support for TTGO LoRa32-OLED v2.1.6. (Thanks to @ChrSchultz, [#692](https://github.com/mcci-catena/arduino-lmic/pull/692).)
 
 - v4.0 is a major release; changes are significant enough to be "likely breaking". It includes the following changes.