ci(wheels): macos-x86: use macos-15-intel runner

Signed-off-by: Zach Lewis <[email protected]>

Author: zachlewis

.github/workflows/wheel.yml

@@ -288,7 +288,7 @@ jobs:
 
   macos:
     name: Build wheels on macOS
-    runs-on: macos-13
+    runs-on: macos-15-intel
     if: |
       github.event_name != 'schedule' ||
       github.repository == 'AcademySoftwareFoundation/OpenImageIO'