Update japanese translation of using mastodon

[peaceroad]

It's been a while. Congratulations on the release of 4.5. With the addition of the quote feature, I wanted to update the Japanese translation. However, I realized that the previous translation was quite outdated, so I completely retranslated it. (I've added notes to the update information from 4.0 onwards, and significantly adjusted the alt text and moving text to make them easier to understand.)

I think this is much better than the Japanese translation currently posted, so I'd be happy if you could update it.

Thank you.