Update pi-install.md (#1577)

* Update pi-install.md

Until updates made to install file this will help anyone starting a new rig to set up and go!

* Clarify

Co-authored-by: Scott Leibrand <scottleibrand@gmail.com>

docs/docs/Build Your Rig/pi-install.md

@@ -2,7 +2,7 @@
 
 ### Download Raspbian and write it to your microSD card ###
 
-Following the [install instructions](https://www.raspberrypi.org/documentation/installation/installing-images/README.md), download Raspbian Lite (you do **not** want Raspbian Desktop) and write it to an microSD card using [Raspberry Pi Imager](https://www.raspberrypi.com/documentation/computers/getting-started.html#using-raspberry-pi-imager).
+Following the [install instructions](https://www.raspberrypi.org/documentation/installation/installing-images/README.md), download Raspbian Lite (Legacy) (you do **not** want Raspbian Desktop, and newer non-legacy versions of Raspbian will cause install to fail) and write it to an microSD card using [Raspberry Pi Imager](https://www.raspberrypi.com/documentation/computers/getting-started.html#using-raspberry-pi-imager).
 
 ### Place your wifi and ssh configs on the new microSD card ###