fixed string in locales

app/src/locales.json

@@ -39,7 +39,7 @@
         "empty": "Empty",
         "delete": "Delete",
         "save": "Save",
-		"add_subjects_at_settings": "You can add subjects at LibreHomework's settings.",
+		"add_subjects_at_settings": "You can add them in the Subjects tab.",
         "hours": "Hours",
         "minutes": "Minutes",
         "seconds": "Seconds",
@@ -95,7 +95,7 @@
         "empty": "Vacía",
         "delete": "Eliminar",
         "save": "Guardar",
-        "add_subjects_at_settings": "Puedes agregar asignaturas en las configuraciones de LibreHomework.",
+        "add_subjects_at_settings": "Puedes agregar asignaturas en el apartado de Asignaturas de LibreHomework.",
         "hours": "Horas",
         "minutes": "Minutos",
         "seconds": "Segundos",