Docker page incorrectly states that arm32/v6 is supported
### Proposed Change

Currently says:

The [Homebridge Docker image](https://github.com/homebridge/docker-homebridge) supports amd64, arm32v6 and arm64v8 host architectures. The correct image for your system will automatically be downloaded.

But if you go to:
https://hub.docker.com/r/homebridge/homebridge/tags

You will see that nothing older than `arm/v7` is supported. 

As another issue, this is really annoying for people trying to use Pi Zero W models for this, which do not seem to be compatible with this image anymore.

### Wiki Page Link

https://github.com/homebridge/homebridge.wiki.git