ci: use macos-15-large to build x86_64 macos

Author: krichprollsch

.github/workflows/build-release.yml

@@ -115,7 +115,7 @@ jobs:
       OS: macos
       ARCH: x86_64
 
-    runs-on: macos-14
+    runs-on: macos-15-large
     steps:
       - uses: mlugg/setup-zig@v2
         with: