do not build xUnit project

Author: dsame

.github/workflows/main_az-appservice-dotnet.yml

@@ -23,7 +23,7 @@ jobs:
           include-prerelease: true
 
       - name: Build with dotnet
-        run: dotnet build --configuration Release
+        run: dotnet build --configuration Release az-appservice-dotnet
 
       - name: dotnet publish
         run: |