Update README.md for bullseye

README.md

@@ -4,13 +4,13 @@ Installscript for setting up a Fido node (or point..) using binkd, husky and gol
 
 # RaspberryPi Image
 
-You can [download a Raspberry Pi SD-Card Image](https://kuehlbox.wtf/fidian-buster.zip) 
-based on the standard Raspbian Buster Image from 2020-02-13.  
+You can [download a Raspberry Pi SD-Card Image](https://www.kuehlbox.wtf/fidian#download) 
+based on the standard Raspbian (aka RaspiOS) Image.  
 This will automatically download and start fidian setup when you first login as 
 the default user "pi" via console or SSH.
 
-Nothing else is done. It's a completely fresh Raspbian installation from 
-February 2020. So, the following steps are strongly adviced:
+Nothing else is done. It's a completely fresh Raspbian installation. 
+So, the following steps are strongly adviced:
 
 1. Run `sudo raspi-config` to change the password for user *"pi"*, 
    setup your localisation options and most important: