Moving armv7 to optional GHA build

[BretFisher]

Due to the reduced use of arm/v7 and the worsening state of getting arm/v7 to build properly, I'm moving it to a comment for optional use and sticking with the default platforms being:

platforms: linux/amd64,linux/arm64

[github-actions]

Docker image tag(s) pushed:

bretfisher/docker-ci-automation:pr-35
bretfisher/docker-ci-automation:05

Labels added to images:

org.opencontainers.image.created=2024-06-19T01:24:50.009Z
org.opencontainers.image.description=GitHub Actions automation examples with Docker's official actions
org.opencontainers.image.licenses=Unlicense
org.opencontainers.image.revision=c0edd93b11abb74fae795ba3ce43ed5b8c0be508
org.opencontainers.image.source=https://github.com/BretFisher/docker-ci-automation
org.opencontainers.image.title=docker-ci-automation
org.opencontainers.image.url=https://github.com/BretFisher/docker-ci-automation
org.opencontainers.image.version=pr-35