See if we can make it use the Intel macOS agent

Author: Numpsy

.github/workflows/main.yml

@@ -7,7 +7,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest, macOS-latest]
+        os: [ubuntu-latest, windows-latest, macOS-13]
         dotnet: [6.0.100]
     runs-on: ${{ matrix.os }}