facebook/install-dotslash

AI Summary: Add testing for ARM architecture to the GitHub Action that installs the dotslash binary. This involves modifying the GitHub Actions workflow to include a job that runs on an ARM virtual machine and executes the `dotslash` binary.

AI Summary: Implement a checksum verification step in the GitHub Action to ensure the integrity of the downloaded `dotslash` binary using the SHA digest provided in the release assets. This involves downloading the expected SHA value from the release metadata and comparing it to the actual SHA of the downloaded binary before proceeding with the installation.