updated README

Author: heneault

README.md

@@ -8,7 +8,7 @@ This code is used to build the linux platform image for the raspberry pi zero an
 1. [Install Docker](https://docs.docker.com/engine/installation/)
 2. `git clone https://github.com/heneault/yocto-pitrezor.git`
 3. `cd yocto-pitrezor`
-4. `sudo ./build-pitrezor.sh TAG [raspberrypi4]` (where TAG is 1.10.4.0 for example, if left blank the script builds latest commit in master branch). You can optionnaly specify "raspberrypi4" to build an image for that platform. Otherwise default is pi zero.
+4. `sudo ./build-pitrezor.sh TAG [raspberrypi4-64 | raspberrypi0-2w-64]` (where TAG is 1.10.5.0 for example, if left blank the script builds latest commit in master branch). You can optionnaly specify "raspberrypi4-64" or "raspberrypi0-2w-64" to build an image for one of these platform. Otherwise the default platform is pi zero.
 
 This creates file `build/pitrezor-MACHINE-TAG.zip` .