Update README.mdx (#102)

Author: iammrsea

exercises/07.error-handling/01.problem.route-errors/README.mdx

@@ -3,7 +3,7 @@
 <EpicVideo url="https://www.epicweb.dev/workshops/full-stack-foundations/error-handling/improving-error-handling-and-ui-on-user-profile-page" />
 
 👨‍💼 If you open <InlineFile file="app/routes/users+/$username.tsx" /> and
-comment in one of the errors Kody 🐨 added for you,
+uncomment one of the errors Kody 🐨 added for you,
 then try loading <LinkToApp to="/users/kody" />, you'll notice the error
 looks pretty bad. We definitely want to customize that!