Improve Japanese translation

[yuk7]

• Default devices are generally translated as "既定のデバイス".(ex.Windows)
• Even in Japan, the brand "Youtube Music" remains the same.
• The notation "イシュー" is not common in Japan.

[welcome]

💖 Thanks for opening this pull request! 💖
Here is a list of things that will help get it across the finish line: - Run npm run lint locally to catch formatting errors earlier. - Include tests when adding/changing behavior. - Include screenshots and animated GIFs whenever possible. - If you added new translation strings ensure that you have added empty strings for all languages - If you added new functionality or modified existing functionality please ensure it is tested

[welcome]

Congrats on merging your first pull request! Have a ⭐

[MarshallOfSound]

Thanks 👍