try macos 11 arm64 build

Author: electronstudio

.github/workflows/build.yml

@@ -117,7 +117,7 @@ jobs:
         python-version: [ '3.10.5' ]
         # Requires universal2 build of python, which we get if we ask for 3.10.5 x86! Pypy not available in universal2
     env:
-      MACOSX_DEPLOYMENT_TARGET: 11.0
+      MACOSX_DEPLOYMENT_TARGET: 11.6
     steps:
       - uses: actions/checkout@v2
         with: