ci: use macos-latest for both targets (macos-13 is deprecated)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Alan Shum

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
           - target: aarch64-apple-darwin
             os: macos-latest
           - target: x86_64-apple-darwin
-            os: macos-13
+            os: macos-latest
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4