fix SiaPropertyGenerator

Author: sicusa

Sia.CodeGenerators/SiaPropertyGenerator.cs

@@ -132,7 +132,7 @@ public static void GenerateSetCommand(
         source.Write(valueType);
         source.Write(" Value) : global::Sia.IReconstructableCommand<");
         source.Write(commandName);
-        source.WriteLine(">, IParallelCommand");
+        source.WriteLine(">, global::Sia.IParallelCommand");
         source.WriteLine("{");
         source.Indent++;