Upgrade macos arm64 wheels runners to macos-15

Author: jobovy

.github/workflows/wheels.yml

@@ -33,7 +33,7 @@ jobs:
         buildplat:
         - [ubuntu-24.04, manylinux, x86_64]
         - [macos-15-intel, macosx, x86_64]
-        - [macos-14, macosx, arm64]
+        - [macos-15, macosx, arm64]
         - [windows-2025, win, amd64]
         python:
         - ["cp310","3.10"]
@@ -99,7 +99,7 @@ jobs:
           buildplat:
             - [ubuntu-24.04, manylinux, x86_64]
             - [macos-15-intel, macosx, x86_64]
-            - [macos-14, macosx, arm64]
+            - [macos-15, macosx, arm64]
             - [windows-2025, win, amd64]
           python:
             - ["cp310","3.10"]