Update application name

Note that, in order to have some consistency, we're always writing
"Consul Democracy", instead of using capital letters sometimes (but not
always), like we did until now.

docs/es/book.json

@@ -1,5 +1,5 @@
 {
   "gitbook": ">= 3.0.0",
-  "title": "Documentación Consul",
+  "title": "Documentación Consul Democracy",
   "description": "Aplicación de Gobierno Abierto y Participación Ciudadana"
 }