[archiso] Document NTFS support (since syslinux 4.06)

Add a note that COW is not supported since ntfs.ko module is used inside initramfs.
(there is no ntfs-3g inside)

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>

docs/README.transfer

@@ -68,13 +68,15 @@ Note: Using here a MBR partition mode as example, but GPT should also works
       Just ensure that partition is set with attribute "2: legacy BIOS bootable"
       and use gptmbr.bin instead of mbr.bin for syslinux.
 
-1) Create one partition entry in MBR (of type "b" for FAT32 or "83" for EXTFS)
-   and mark it as "active" (bootable).
+1) Create one partition entry in MBR and mark it as "active" (booteable).
+Note: Type "b" for FAT32, "83" for EXTFS or "7" for NTFS.
 # fdisk <DEV-TARGET>
 
-2) Create a FAT32 or EXTFS filesystem on such partition and setup a label.
+2) Create a FAT32, EXTFS or NTFS filesystem on such partition and setup a label.
+Note: COW is not supported on NTFS.
 # mkfs.vfat -F 32 -n <FS-LABEL> <DEV-TARGET-N>
 # mkfs.ext4 -L <FS-LABEL> <DEV-TARGET-N>
+# mkfs.ntfs -L <FS-LABEL> <DEV-TARGET-N>
 
 3) Mount target filesystem.
 # mount <DEV-TARGET-N> <MNT-TARGET-N>