Use newer Actions runners

Author: philrz

.github/workflows/ci.yaml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-12, ubuntu-20.04, windows-2022]
+        os: [macos-14, ubuntu-24.04, windows-2022]
     steps:
       - uses: actions/checkout@v4
         with: