Merge pull request matplotlib#30668 from QuLogic/cibw-macos-update

cibw: Switch macos 13 to 15 Intel

Author: greglucas

.github/workflows/cibuildwheel.yml

@@ -130,7 +130,7 @@ jobs:
             cibw_archs: "AMD64"
           - os: windows-11-arm
             cibw_archs: "ARM64"
-          - os: macos-13
+          - os: macos-15-intel
             cibw_archs: "x86_64"
           - os: macos-14
             cibw_archs: "arm64"