Update SoftwareSerialExample.ino

Also includes Micros per https://www.arduino.cc/en/Reference/SoftwareSerial

Author: paulvivier

libraries/SoftwareSerial/examples/SoftwareSerialExample/SoftwareSerialExample.ino

@@ -13,7 +13,7 @@
  so only the following can be used for RX:
  10, 11, 12, 13, 50, 51, 52, 53, 62, 63, 64, 65, 66, 67, 68, 69
 
- Not all pins on the Leonardo support change interrupts,
+ Not all pins on the Leonardo and Micro support change interrupts,
  so only the following can be used for RX:
  8, 9, 10, 11, 14 (MISO), 15 (SCK), 16 (MOSI).