ci: select xcode 15+ explicitly

Author: rigor789

.github/workflows/npm_release.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: maxim-lobanov/setup-xcode@v1
         with:
-          xcode-version: latest-stable
+          xcode-version: "^15.0"
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0