Update src/pybind11/PyBindImath/CMakeLists.txt #1143

Job	Run time
macOS.2: Debug / steps	11m 3s
macOS.3: static / steps	14m 11s
macOS.6: macos-14 / steps	14m 25s
macOS.4: pkgconfig=OFF, testing=OFF / steps	56s
Linux.2: Debug / steps	12m 50s
Linux.3: static / steps	18m 47s
macOS.1: Release / steps	18m 44s
Linux.1: Release / steps	18m 26s
macOS.7: Apple Frameworks / steps	31s
Linux.4: pkgconfig=OFF, testing=OFF, python=OFF / steps	1m 7s
Linux.7: cmake 4 / steps	18m 18s
Linux.6: clang / steps	18m 44s
Linux.5: custom namespace / steps	18m 33s
Windows.2: Debug / steps	4m 5s
Windows.1: Release / steps	16m 46s
macOS.5: macos-15-intel / steps	28m 13s
Windows.7: msys2-mingw32, static / steps	4m 48s
Windows.8: msys2-ucrt64 / steps	4m 46s
Windows.3: static / steps	17m 3s
Windows.4: pkgconfig=OFF, testing=OFF / steps	1m 27s
Windows.9: msys2-ucrt64, static / steps	4m 41s
Windows.6: msys2-mingw32 / steps	4m 17s
Windows.5: vfx2023 / steps	17m 37s
	4h 30m 18s

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