fix(ci): migrate macOS x64 release runner to macos-26-intel

[andya1lan]

改了什么 / What changed

• Replace the retired macos-13 runner used by the macOS x64 release job with macos-26-intel.
• Update the related comments while preserving the existing non-blocking x64 release behavior.

为什么 / Why

GitHub shut down the macOS 13 runner image on December 4, 2025:
https://github.blog/changelog/2025-09-19-github-actions-macos-13-runner-image-is-closing-down/

macos-26-intel is the current supported macOS 26 x64 runner label:
https://github.com/actions/runner-images#available-images

测试 / Testing

• Parsed .github/workflows/release.yml successfully with Ruby YAML.
• git diff --check passes.
• No application tests were run because this only changes the GitHub Actions runner image.

Checklist

• 代码风格和现有文件一致 / Code style matches existing files
• 没有引入 npm 依赖 / No new npm dependencies
• 不涉及 LS binary 协议 / LS binary protocol not affected
• 不涉及 dashboard UI / Dashboard UI not affected

[Copilot]

Pull request overview

This PR updates the GitHub Actions release workflow to keep the non-blocking macOS x64 build running on a supported Intel runner image, after the retirement of macos-13.

Changes:

• Switch the macOS x64 release job runner from macos-13 to macos-26-intel.
• Update surrounding workflow comments/step labels to reflect the new runner choice while preserving the existing non-blocking behavior.

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