Update README.md

README.md

@@ -138,7 +138,7 @@ db.orders.find( {"shipping.bags": { $eq:2}}).map(obj => obj.customer.pseudo)
 ### requête 6
 
 ```js
-db.orders.aggregate([ { $group:{ _id: { id: "$customer.id", pseudo: "$customer.pseudo"}, total: {$sum: 1}}}])
+db.orders.aggregate([ { $group:{ _id: { id: "$customer.id", pseudo: "$customer.pseudo"}, commandes: {$sum: 1}}}])
 ```
 
 ### requête 7