Work CI-CD

- Replace wildcard in solution name.

***NO_CI***

Author: josesimoes

azure-pipelines.yml

@@ -21,7 +21,7 @@ pool:
 
 variables:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true
-  solution: '**/*.sln'
+  solution: 'nanoframework.System.Net.Websockets.sln'
   buildPlatform: 'Any CPU'
   buildConfiguration: 'Release'
   nugetPackageName: 'nanoFramework.System.Net.WebSockets'