Do not capitalize PARTUUID

- it is not needed for booting the "Raspberry PI OS" way
- it breaks booting with an intitramfs

Rocky8_Rpi4.ks

@@ -150,7 +150,7 @@ UUID_ROOTFS="$(/bin/cat $INSTALL_ROOT/etc/fstab | \
 
 # Get the PARTUUID of the rootfs partition
 PART_UUID_ROOTFS="$(/sbin/blkid  "$(/sbin/blkid --uuid $UUID_ROOTFS)" | \
-/bin/awk '{print toupper($NF)}' | /bin/tr -d '"' )"
+/bin/awk '{print $NF}' | /bin/tr -d '"' )"
 
 # Configure the kernel commandline
 /bin/sed -i "s/root= /root=${PART_UUID_ROOTFS} /" $INSTALL_ROOT/boot/cmdline.txt