Add Japanese translation of the PRs below

[kzhirata]

Description

Add Japanese translation of
#327
#326

Motivation and Context

Types of changes

• Change to the site (I am attaching a screenshot showing the before and after)
• Code example added (and I also added the example to all translated languages)
• Improved translation
• Added new translation (and I also added a notice to each document missing translation)

Checklist

• I have read the contributing document.
• I have used hugo to render the site/docs locally and I am sure it works.

[harsha509]

HI @kzhirata,

Thanks for the PR. I've made one suggestion. Can you please look into it.

Thanks,
Harsha

[harsha509]

Suggested change

	[insecure certificate error](//developer.mozilla.org/de/docs/Web/WebDriver/Errors/InsecureCertificate) が返されます。
	[insecure certificate error](//developer.mozilla.org/ja/docs/Web/WebDriver/Errors/InsecureCertificate) が返されます。

[kzhirata]

@harsha509 Thank you for reviewing. I've fixed the links.

[harsha509]

@harsha509 Thank you for reviewing. I've fixed the links.

Thanks for updating the links to the translated pages too!

[diemol]

Thank you @kzhirata!