Spanish translation for widgets

[gao-sun]

@JesusM @kant would you mind to update Spanish translation for widgets when convenient? Thanks!

[JesusM]

Here you have:

//MARK: Widget
"widget.not_available" = "eul no está arrancado";
"widget.cpu.title" = "Widget de CPU";
"widget.cpu.description" = "Mostrar información de CPU";
"widget.memory.title" = "Widget de memoria";
"widget.memory.description" = "Mostrar información de memoria";
"widget.battery.title" = "Widget de batería";
"widget.battery.description" = "Mostrar Widget de batería";
"widget.network.title" = "WIdget de red";
"widget.network.description" = "Mostrar Widget de red";

Let me know if you want me to raise a PR with ^

[gao-sun]

@JesusM that's enough. thanks!