Update Microsoft.FileServices.json

Author: MSFT-Andrea

changelog/Microsoft.FileServices.json

@@ -1,5 +1,23 @@
 {
   "changelog": [
+    {
+      "ChangeList": [
+        {
+          "Id": "e010d96a-7a4e-4b7c-aa22-05bd067da980",
+          "ApiChange": "Property",
+          "ChangedApiName": "itemCount",
+          "ChangeType": "Addition",
+          "Description": "Added the **itemCount** property to the [list](https://learn.microsoft.com/en-us/graph/api/resources/list?view=graph-rest-beta) resource.",
+          "Target": "list"
+        }
+      ],
+      "Id": "e010d96a-7a4e-4b7c-aa22-05bd067da980",
+      "Cloud": "Prod",
+      "Version": "beta",
+      "CreatedDateTime": "2026-03-29T23:41:39.1409717Z",
+      "WorkloadArea": "Files",
+      "SubArea": ""
+    },
     {
       "ChangeList": [
         {