support zvol devices (#2678)

their partitions are exposed as "/dev/zdXXpY", handle accordingly.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

INSTALL/tool/ventoy_lib.sh

@@ -92,6 +92,8 @@ get_disk_part_name() {
         echo ${DISK}p${2}
     elif echo $DISK | grep -q "/dev/nbd[0-9]"; then
         echo ${DISK}p${2}
+    elif echo $DISK | grep -q "/dev/zd[0-9]"; then
+        echo ${DISK}p${2}
     else
         echo ${DISK}${2}
     fi