Update dotnet.yml

.github/workflows/dotnet.yml

@@ -16,7 +16,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 7.0.x
+        dotnet-version: 8.0.x
         include-prerelease: true
     - name: Add gh nuget registry
       run: dotnet nuget add source --username Atulin --password ${{ secrets.GITHUB_TOKEN }} --store-password-in-clear-text --name github "https://nuget.pkg.github.com/atulin/index.json"