Update CI to support net8

.github/workflows/Build.yml

@@ -22,7 +22,9 @@ jobs:
       - name: NuGet Setup
         uses: actions/setup-dotnet@v2
         with:
-          dotnet-version: 7.0.x
+          dotnet-version: | 
+            7.0.x
+            8.0.x
       - name: "NuGet Add Source Organization"
         run: if ("${{ secrets.ORGANIZATION_SOURCE_PACKAGE_PASSWORD }}" -ne "") { dotnet nuget add source --username ${{ secrets.ORGANIZATION_SOURCE_PACKAGE_USERNAME }} --password ${{ secrets.ORGANIZATION_SOURCE_PACKAGE_PASSWORD }} --store-password-in-clear-text --name github "https://nuget.pkg.github.com/${{github.repository_owner}}/index.json" }