Add Linux ARM64 build to GitHub Actions

[leizongmin]

Add support for building and releasing linux arm64 binaries using GitHub Actions.

• README.md

  • Add linux arm64 to the list of supported architectures in the "安装" section.

• .github/workflows/build-release.yml

  • Add a new job build_linux_arm64 to build linux arm64 binaries using docker/setup-qemu-action.
  • Add steps to set up QEMU, set up Go, check out code, build the binary, list files, and upload the artifact.
  • Add a step to upload the linux arm64 binaries as release assets in the release job.

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