LibWeb: Remove StringBuilder from HTMLToken::m_comment_or_character

Author: https://github.com/gunnarbeutner
Commit: c3ad8e9a52
Pull-request: https://github.com/SerenityOS/serenity/pull/8687
Reviewed-by: https://github.com/alimpfard

Userland/Libraries/LibWeb/HTML/Parser/HTMLToken.cpp

@@ -53,7 +53,7 @@ String HTMLToken::to_string() const
 
     if (type() == HTMLToken::Type::Comment || type() == HTMLToken::Type::Character) {
         builder.append(" { data: '");
-        builder.append(m_comment_or_character.data.to_string());
+        builder.append(m_comment_or_character.data);
         builder.append("' }");
     }