WIP: Let macos-14 run alone, on GitHub Actions

Author: N-Dekker

.github/workflows/ElastixGitHubActions.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       max-parallel: 3
       matrix:
-        os: [ubuntu-22.04, windows-2022, macos-14]
+        os: [macos-14]
         include:
           - os: ubuntu-22.04
             c-compiler: "gcc"