feat(locale): change to en_US.UTF-8•••Polish KDE translations are embarassing to look at sometimes,
and participation with international community requires English too.
Signed-off-by: Marek Paśnikowski <marek@marekpasnikowski.pl>
Move channels.scm to the top-level•••This file is going to collect all channel definitions, independent of any
deployment variables.
Also, update the missed "secrets" name in .guix-channel .
