Add missing comment to indicate nodiscard ignore

include/ls-std/io/xml/XmlReader.hpp

@@ -30,7 +30,7 @@ namespace ls::std::io
 
       // implementation
 
-      ls::std::core::type::byte_field read() override;
+      ls::std::core::type::byte_field read() override; // nodiscard is optional here
 
       // additional functionality