[enhancement]: update doc on how to build for different architectures

[escherstair]

Task name

Docker@2

Describe your feature request here

Here I can see official doc describing how to build images for other architectures, using QEMU.
This is suggested in the following way

# register QEMU binary - this can be done by running the following image
docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
# build your image

But multiarch/qemu-user-static image is quite old and no more updated.

Looking to docker official doc, a different image is suggested for the same purpose

docker run --privileged --rm tonistiigi/binfmt --install all

I tested it and it's a drop-in replacement, with much better performances.

I suggest MS to update the doc.