Update DataReaderFactoryWriter.cs

Author: pwelter34

src/FluentCommand.Generators/DataReaderFactoryWriter.cs

@@ -11,9 +11,8 @@ public static string Generate(EntityClass entityClass)
 
         var codeBuilder = new IndentedStringBuilder();
         codeBuilder
-            .AppendLine("// <auto-generated>")
-            .AppendLine("//     Generated by the FluentCommand source generator.")
-            .AppendLine("// </auto-generated>")
+            .AppendLine("// <auto-generated />")
+            .AppendLine("#nullable enable")
             .AppendLine()
             .AppendLine("using global::FluentCommand.Extensions;")
             .AppendLine();