Format index.html with default Pretter config

[DaleSeo]

During the meeting, we agreed to format the code in the index.html file using the default Prettier config. This will help the team to format the code consistently going forward. If you've customized the Prettier config and it can format the code differently, please disable the format on save feature in VSCode before editing the index.html file.

Checklist before merging

• Link an issue with the pull request
• Ensure no errors or warnings on the browser console
• Avoid additional major pushes after approval (if necessary, request a new review)

[SamTheKorean]

알겠습니다!