[UI] update ja locale translation

[tajisoft]

Description

This PR is update Japanese translation.
I think I broke my previous PR #6195. So I re-open one.
If this PR is ok. I'll close #6195.

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

Yes. Reviewed in PR #6195.

[acs-robot]

Found UI changes, kicking a new UI QA build
@blueorangutan ui

[blueorangutan]

@acs-robot a Jenkins job has been kicked to build UI QA env. I'll keep you posted as I make progress.

[blueorangutan]

UI build: ✔️
Live QA URL: http://qa.cloudstack.cloud:8080/client/pr/6332 (SL-JID-1488)

[nvazquez]

LGTM based on the testing on the previous PR #6195

[yadvr]

@blueorangutan ui

[blueorangutan]

@rohityadavcloud a Jenkins job has been kicked to build UI QA env. I'll keep you posted as I make progress.

[blueorangutan]

UI build: ✔️
Live QA URL: http://qa.cloudstack.cloud:8080/client/pr/6332 (SL-JID-1585)

[boring-cyborg]

Awesome work, congrats on your first merged pull request!