Add Apple Silicon build target

[google-labs-jules]

Updated .github/workflows/release.yml to support Apple Silicon.

• Pinned existing macOS build to macos-13 (Intel) to produce lanshare-macos-amd64.
• Added new build job on macos-14 (Apple Silicon) to produce lanshare-macos-arm64.

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PR created automatically by Jules for task 700160114524788396 started by @jiang1997

[google-labs-jules]

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