Completed Japanese translation of Cross-Origin Resource Sharing

Hello.

I was just finished translate of Cross-Origin Resource Sharing.

https://lv7777.github.io/w3c_cors/Cross-Origin%20Resource%20Sharing.htm

I have first time on the w3c translation, so perhaps you found some issue.
If you have issue, please report issue on github.

https://github.com/lv7777/w3c_cors/issues

Regards.
Ryouyu Onuma, lv7777