ci: push multi-platform docker images

[sebastiendan]

Description

Docker images are only built with the default linux/amd64 platform. This PR adds the linux/arm64 platform to add support for arm based architectures (e.g., Apple Silicon macs).

Additions and Changes

New feature (non-breaking change which adds functionality)

• Specify explicitly platforms to be used as target in the docker-build-push community Github Action

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works