build targets dotnet 7

Author: sxotney

.github/workflows/ci-build.yml

@@ -24,7 +24,7 @@ jobs:
     - name: Setup .NET
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: '6.0'
+        dotnet-version: '7.0'
     - name: Install dependencies
       run: dotnet restore UnlockedData.Chartist.Blazor.sln
     - name: ngbv set version