Translate /services/index.md, Ember 5.11

[BlueCutOfficial]

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File: guides/services/index.md
From Ember: 5.4
To Ember: 5.11

In the snippet below, you can see what changes were done in the latest English documentation. The purpose of this issue is to adjust the French translation to match the new version:

diff --git a/guides/services/index.md b/guides/services/index.md
index e9daa7e42..59d2627b8 100644
--- a/guides/services/index.md
+++ b/guides/services/index.md
@@ -33,22 +33,22 @@ Like any Ember object, a service is initialized and can have properties and meth
 Below, the shopping cart service manages an items array that represents the items currently in the shopping cart.
 
 javascript {data-filename=app/services/shopping-cart.js}
-import { A } from '@ember/array';
+import { TrackedArray } from 'tracked-built-ins';
 import Service from '@ember/service';
 
 export default class ShoppingCartService extends Service {
-  items = A([]);
+  items = new TrackedArray([]);
 
   add(item) {
-    this.items.pushObject(item);
+    this.items.push(item);
   }
 
-  remove(item) {
-    this.items.removeObject(item);
+  remove(item) 
+    this.items.splice(this.items.indexOf(item), 1);
   }
 
   empty() {
-    this.items.clear();
+    this.items.splice(0, this.items.length);
   }
 }