fix: only build the bouncy cert and use the websocket if 472

src/Pepperdash.Core/Web/BouncyCertificate.cs

@@ -1,5 +1,6 @@
 using Crestron.SimplSharp;
 
+#if NET472
 using System;
 using System.Collections.Generic;
 using System.IO;
@@ -357,4 +358,5 @@ namespace PepperDash.Core
             return bRet;
         }
     }
-}
+}
+#endif