Brand request: fa-pixiv (update)

[petamoriken]

Description

ref: #5093

We have updated the pixiv service's logo and would like to have a new logo for Font Awesome as well.
FYI: https://www.pixiv.net/info.php?id=12001

You can download the logo file here.
NOTE: The corporate logo remains unchanged, but we prefer that users should use the service's logo.

Official website

https://www.pixiv.net/

Brand guidelines

https://policies.pixiv.net/en.html#brand

Icon request checklist

• The title starts with "Brand request: ", is followed by the requested brand name
• I have searched for existing issues and to the best of my knowledge this is not a duplicate
• I have understood how requests work