Don't build wheels on deprecated MacOS

Author: jhale

.github/workflows/build-wheels.yml

@@ -40,7 +40,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, macos-10.15, macos-11]
+        os: [ubuntu-20.04, macos-11, macos-12]
 
     steps:
       - uses: actions/checkout@v3