Make the error page responsive and mobile friendly

[Aman-Codes]

Description

The error page should be made responsive and user experience should be good on all screen sizes.

Relevant Files

• https://github.com/webevaluator/webevaluator.github.io/blob/master/src/pages/ErrorPage/index.jsx
• https://github.com/webevaluator/webevaluator.github.io/blob/master/src/pages/ErrorPage/styles.js