fix regexp - only the first digit would be non-zero, subsequent ones …

…might be

src/extension/VSProject.cs

@@ -53,7 +53,7 @@ public class VSProject : IProject
         /// </summary>
         private const string SOLUTION_EXTENSION = ".sln";
 
-        private static readonly Regex netFramework = new Regex("^net[1-9]+");
+        private static readonly Regex netFramework = new Regex("^net[1-9]");
 
         /// <summary>
         /// The XML representation of the project