ci: add arm docker images

[martadams89]

Add arm64 images to ci pipeline

[acasajus]

• can you update the action definition so it's also triggered when the workflow file changes so we can make sure this change doesn't break anything?

[martadams89]

@acasajus thanks, I've updated to run only on

on:
  push:
    paths:
      - '.github/workflows/main.yml'

This means the workflow will only run when this file is updated - not sure if this is what you were asking for?

[acasajus]

I'd like to run the action in this MR so we can make sure it won't break the rest when we merge this one.

[martadams89]

Anything you need me to do on the PR so that the action can be tested?