Fix tests

Author: P-E-Meunier

.github/workflows/tests-nix-macos.yml

@@ -7,7 +7,7 @@ jobs:
     strategy:
       matrix:
         platform:
-          - macos-12
+          - macos-13
     runs-on: ${{ matrix.platform }}
     steps:
     - uses: actions/checkout@v4