chore: fix typos

[dongseoplee]

Hello! 😊 I'm a MyBatis user who finds it incredibly useful. I noticed the message asking for help to improve the documentation, so I've corrected a few typos in the Korean text. Please review and merge! Thank you, and have a great day! 🌟

[harawata]

Thank you for the PR, @dongseoplee !

We will merge this if there is no comment from other Korean users for a few days.

[dongseoplee]

Thank you for reviewing my PR! I’ll be waiting for my PR to be merged. 👍

[harawata]

Thank you, @dongseoplee !