Update nano-getting-started.md

Author: Hannes7eicher

content/hardware/03.nano/boards/nano/tutorials/nano-getting-started/nano-getting-started.md

@@ -26,7 +26,7 @@ To install it, you will need a version of the Arduino IDE, which you can downloa
 
 ## Install Board Package
 
-To install the board package, open the "Board Manager" from the menu to the left. Search for Nano and install the latest version (or the version you want to use).
+The [Arduino Core for AVR devices](https://github.com/arduino/ArduinoCore-avr) comes preinstalled with the IDE, so no additional installation is necessary to get started.  To use a different version than the latest, open the "Board Manager" from the left-hand menu. Search for Nano and install the version you want to use.
 
 ![Arduino AVR Board Package](./assets/install-nano-core.png)