Add windows-11-arm to CI.

Author: alexrp

.github/workflows/build.yml

@@ -28,6 +28,7 @@ jobs:
           - ubuntu-22.04-arm
           - ubuntu-24.04
           - ubuntu-24.04-arm
+          - windows-11-arm
           - windows-2019
           - windows-2022
           - windows-2025