Issue on docs - keys in code don't match Example space key (firstName vs. first_name)

[arashyazdidev]

Path: /quickstart/add-data-transformation

When following the documentation and Example space setup in the getting-started module, the keys don't match what is in the javascript and typescript code snippets:

The code is written as firstName but in the Example Flatfile space, it is first_name

What is in the code snippets from the article:

listener.use(
  recordHook("contacts", (record) => {
    const value = record.get("firstName");

    if (typeof value === "string") {
      record.set("firstName", value.toLowerCase());
    }

    return record;
  })
);

What it should be to match the keys auto-generated in demo space:

 listener.use(
 recordHook("contacts", (record) => {
   const value = record.get("first_name");

   if (typeof value === "string") {
     record.set("first_name", value.toLowerCase());
   }

   return record;
 })
);