Adjust workflow to only install the .NET 8.0 SDK

Author: Shane32

.github/workflows/wf-verify-formatting.yml

@@ -15,12 +15,7 @@ jobs:
     - name: Install additional .NET SDKs
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: | 
-          1.0.x
-          2.0.x
-          5.0.x
-          6.0.x
-          8.0.x
+        dotnet-version: 8.0.x
 
     - name: Restore NuGet Packages
       run: dotnet restore