Update buildandtest.yml

Author: MarkCiliaVincenti

.github/workflows/buildandtest.yml

@@ -38,10 +38,12 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - name: Setup .NET SDK 9.0.x
+      - name: Setup .NET SDK
         uses: actions/setup-dotnet@v4
         with:
-          dotnet-version: 9.0.x
+          dotnet-version: |
+            8.0.x
+            9.0.x
 
       - name: Show dotnet Version
         run: |