yeah I changed the command to use the latest Orange Pi 5 image. Just copied here the command from the guide 
Proper one would be:
cd /tmp
curl -O https://dietpi.com/downloads/images/DietPi_OrangePi5-ARMv8-Bookworm.img.xz
7zr x DietPi_OrangePi5-ARMv8-Bookworm.img.xz
dd if= DietPi_OrangePi5-ARMv8-Bookworm.img of=/dev/mmcblk2 bs=1M status=progress
in case anyone else might need it