Run on macos 15 intel instead

Author: liuzicheng1987

.github/workflows/macos.yaml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ["macos-latest", "macos-13"]
+        os: ["macos-latest", "macos-15-intel"]
         format: ["tests", "benchmarks"]
     name: "${{ matrix.os }} (${{ matrix.format }})"
     concurrency: