Update macos versions in the CI

Author: viferga

.github/workflows/test.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-12, macos-13, macos-14]
+        os: [macos-13, macos-14, macos-15]
     runs-on: ${{ matrix.os }}
     steps:
       - name: Check out the repository