try ci without specifying .net versions

Author: voltaney

.github/workflows/ci.yml

@@ -8,15 +8,19 @@ on:
 jobs:
   build-and-test:
     runs-on: windows-latest
+    strategy:
+      matrix:
+        dotnet-version: ["8.0.x", "9.0.x"]
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
-      - name: Setup .NET
-        uses: actions/setup-dotnet@v4
-        with:
-          dotnet-version: 8
+      # If preinstalled in windows-latest, this step can be skipped
+      # - name: Setup .NET ${{ matrix.dotnet-version }}
+      #   uses: actions/setup-dotnet@v4
+      #   with:
+      #     dotnet-version: ${{ matrix.dotnet-version }}
 
       - name: Build
         run: dotnet build --configuration Release