Update Apple silicon install guide to reflect support for it

[PeterN]

Is your feature request related to a problem? Please describe.
Future builds now support apple silicon. As we're not yet using GitHub for our builds, this does not reflect as code change.

Describe the solution you'd like
Update all aspects of the apple silicon support documentation, such as readme (landing page for pypi wheel) and m1 install guide readme.

This support will be available in 0.5.4, until then rosetta must be used (unless we backfill the builds)