Remove obsolete macos-13 GH runner

Author: bladyjoker

.github/workflows/simulation.yaml

@@ -26,7 +26,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-13, macos-14, ubuntu-22.04]
+        os: [macos-14, ubuntu-22.04]
         ghc-version: ["9.8"]
 
     steps: