reduce the matrix

Author: stewartboogert

.github/workflows/main.yaml

@@ -18,8 +18,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        geant4-version: ["v10.7.4", "v11.0.4", "v11.1.3", "v11.2.2"]
-        os: [macOS-13, macOS-14]
+        geant4-version: ["v10.7.4"]
+        os: [macOS-13]
+#        geant4-version: ["v10.7.4", "v11.0.4", "v11.1.3", "v11.2.2"]
+#        os: [macOS-13, macOS-14]
 
     steps:
       - uses: actions/checkout@v4