Webp.json files in WordPress core files

Hi there,

First of all I want to thank you for this great plugin!

I have a question about the following:

When I scan my website with the Wordfence plugin, I get the message “Unknown file in the WordPress core”.

• /public_html/wp-admin/images/loading.gif.webp.json
• /public_html/wp-admin/images/w-logo-blue.png.webp.json

Now my question is: are these files generated by your plugin? I suspect this because of the webp extensions (altough the files end on .json).

Elias