WIP: test on Linux aarch64

- needs stable openslide-bin linux-aarch64 binaries

Author: bgilbert

.github/workflows/python.yml

@@ -42,7 +42,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, ubuntu-24.04-aarch64, macos-latest]
         python-version: [3.8, 3.9, "3.10", "3.11", "3.12", "3.13-dev"]
         openslide: [system, wheel]
         include: