_config.yml: switch from include to keep_files

Ref: #264

Author: Mikaela

_config.yml

@@ -24,7 +24,7 @@ plugins:
     - jekyll-sitemap
 sitemap:
     file: "/sitemap.xml"
-include: [PGP, PHP, keybase.txt, robots.txt, .well-known, ipfs-files]
+keep_files: [PGP, PHP, keybase.txt, robots.txt, .well-known, ipfs-files]
 
 avatar: https://bafybeian33l6hrvjoapve7dxbghs2ej4zeya2cgoldrqo3tm5id7tj6uey.ipfs.dweb.link/250.jpeg
 icon: https://bafybeian33l6hrvjoapve7dxbghs2ej4zeya2cgoldrqo3tm5id7tj6uey.ipfs.dweb.link/128.jpeg