Added comment where appropriate

Author: corymharper

test/puppeteer/src/index.ts

@@ -1,6 +1,7 @@
 // Imports
 import helloWorld from 'w3c-css-validator';
 
+// Wait until DOM content is available to attempt to make changes
 document.addEventListener('DOMContentLoaded', () => {
 	// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-unsafe-call
 	document.title = helloWorld();