Update docker-build-push.yml to support arm64

[rexeo-asia]

Please provide enough information so that others can review your pull request:
To include arm64 build in https://hub.docker.com/r/frappe/erpnext/tags

Explain the details for making this change. What existing problem does the pull request solve?
To support arm64 container image

[revant]

We'll be adding this PR to the list of slow builds

Read here: https://github.com/frappe/frappe_docker/wiki/Frequently-Asked-Questions#how-to-build-arm64-images

[revant]

Should we just do the merge, fail and revert for the PR "Hall of fame"? OR close this without that?
Because the maintenance overhead is on me. (The merge, one release fail, I manually push failed release and revert, too much unnecessary steps)

• It takes 2 hours for builds every time this PR comes up
• Python Version for frappe and Debian APT get python is different, causing pip to build many things instead of just using ready binaries.
• ARM runner required for this. It will speed up on ARM runner, Ubuntu/AMD64 runner takes 2+ hours for arm builds