Update to MacOS 13 in build jobs

Author: gestrich

.github/workflows/validate_secrets.yml

@@ -4,7 +4,7 @@ on: [workflow_call, workflow_dispatch]
 
 jobs:
   validate:
-    runs-on: macos-12
+    runs-on: macos-13
     steps:
       # Checks-out the repo
       - name: Checkout Repo