Bump MacOS runner to macos-14

Author: anujc25

.github/workflows/tests-unit.yml

@@ -36,7 +36,7 @@ jobs:
           - ubuntu-latest
           - ubuntu-22.04
           - macos-latest
-          - macos-13
+          - macos-14
           - windows-latest
           - windows-2019
     runs-on: ${{ matrix.os }}