autofix: No aarch64-unknown-linux-gnu build anywhere

[justrach]

Auto-generated by codegraff-autofix from PR #87 review.

Finding: No aarch64-unknown-linux-gnu build anywhere (P1)
File:line: .github/workflows/sdk-typescript-publish.yml:92

Reviewer comment:

The pre-flight comment block (lines 12-17) lists @codegraff/sdk-linux-arm64-gnu as a subpackage requiring Trusted Publisher configuration. However, the build matrix (line 92-107) only covers aarch64-apple-darwin, x86_64-apple-darwin, and x86_64-pc-windows-msvc, and the build-linux job (line 162) only builds x86_64-unknown-linux-gnu. There is no job or matrix entry for aarch64-unknown-linux-gnu. Running this workflow as-is will publish a release that either omits the linux-arm64 subpackage entirely (stranding arm64 Linux users) or publishes it without a native .node binary, depending on napi prepublish behavior. Add the target: either add aarch64-unknown-linux-gnu as a matrix entry (if it can cross-compile from ubuntu-latest) or add a separate build-linux-arm64 job equivalent to build-linux.

🤖 patch generated by Codegraff agent in a sandbox.

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