Updated file names required in the challenge (#37737)

challenge requires two files to be created whose names are given with first letter in uppercase but further down in the description those files are imported with lowercase name.
it is little confusing and requires renaming of files

curriculum/challenges/english/06-information-security-and-quality-assurance/advanced-node-and-express/clean-up-your-project-with-modules.english.md

@@ -9,7 +9,7 @@ forumTopicId: 301549
 <section id='description'>
 As a reminder, this project is being built upon the following starter project on <a href='https://glitch.com/edit/#!/remix/clone-from-repo?REPO_URL=https://github.com/freeCodeCamp/boilerplate-advancednode/'>Glitch</a>, or cloned from <a href='https://github.com/freeCodeCamp/boilerplate-advancednode/'>GitHub</a>.
 Right now everything you have is in your server.js file. This can lead to hard to manage code that isn't very expandable.
-Create 2 new files: Routes.js and Auth.js
+Create 2 new files: routes.js and auth.js
 Both should start with the following code:
 
 ```js