remove deprecated mac-os12

Author: LeonieFierz

.github/workflows/pyhton.build_deploy.yml

@@ -49,7 +49,7 @@ jobs:
     strategy:
       matrix:
         py-version: ["3.8", "3.9"]
-        os: [ubuntu-22.04, windows-2019, macOS-12, macOS-15]
+        os: [ubuntu-22.04, windows-2019, macOS-13, macOS-15]
       fail-fast: false
     runs-on: ${{ matrix.os }}
     needs: generate-wrapper