mastodon recipe points to incorrect repository

[dmacvicar]

https://github.com/dimitri/el-get/blob/master/recipes/mastodon.rcp

points to:

(:name mastodon
       :website "https://github.com/jdenen/mastodon.el"
       :description "Emacs client for Mastodon"
       :type github
       :pkgname "jdenen/mastodon.el"
       :load-path ("./lisp"))

when MELPA already points to the current repository:

(mastodon :fetcher codeberg :repo "martianh/mastodon.el")