Updated io\serialport\locales\ja\25-serial.json

[1ft-seabass]

Proposed changes

• Adjusted current locales JSON file format.
• Localization in Japanese in added elements (words and phrase).

Checklist

• I have read the contribution guidelines
• For non-bugfix PRs, I have discussed this change on the forum/slack team.
  • I heared and discussed about 25-serial.json from @kazuhitoyokoi at Hacktoberfest 2020.
• I have run grunt to verify the unit tests pass
• I have added suitable unit tests to cover the new/changed functionality

[coveralls]

Coverage remained the same at 46.849% when pulling 83d9f86 on 1ft-seabass:tseigo-patch-1 into e198c5d on node-red:master.

[coveralls]

Coverage remained the same at 46.849% when pulling 83d9f86 on 1ft-seabass:tseigo-patch-1 into e198c5d on node-red:master.

[kazuhitoyokoi]

@1ft-seabass Good job! I checked the translations.