chore: Use newer CMake on macOS ARM

Not sure 3.15 supported macOS ARM, and people don't have old cmake on macOS ARM anyway.

Co-authored-by: Henry Schreiner <[email protected]>

Author: DimitriPapadopoulos

.github/workflows/ci.yml

@@ -75,7 +75,7 @@ jobs:
           # TODO: investigate failure with pypy-3.9/macos-latest (#1166)
           - python-version: "pypy-3.10"
             runs-on: macos-latest
-            cmake-version: "3.15.x"
+            cmake-version: "4.0.x"
           - python-version: "3.9"
             runs-on: macos-15-intel
             cmake-version: "3.18.x"