update wording for USB device vs CDROM

salt/common/tools/sbin/soup

@@ -47,7 +47,7 @@ airgap_mounted() {
     echo "If you just copied the .iso file over you can specify the path."
     echo "If you burned the ISO to a disk the standard way you can specify the device."
     echo "Example: /home/user/securityonion-2.X.0.iso"
-    echo "Example: /dev/cdrom"
+    echo "Example: /dev/sdx1"
     echo ""
     read -p 'Enter the location of the iso: ' ISOLOC
     if [ -f $ISOLOC ]; then