Update sample comment and article date per feedback

Co-authored-by: BillWagner <493969+BillWagner@users.noreply.github.com>

Author: Copilot

docs/fsharp/using-fsharp-on-azure/blob-storage.md

@@ -2,7 +2,7 @@
 title: Get started with Azure Blob Storage using F#
 description: Store unstructured data in the cloud with Azure Blob Storage.
 author: sylvanc
-ms.date: 09/17/2024
+ms.date: 10/02/2025
 ms.custom: "devx-track-fsharp"
 ai-usage: ai-assisted
 ---

samples/snippets/fsharp/azure/blob-storage.fsx

@@ -1,3 +1,6 @@
+// This sample uses the modern Azure.Storage.Blobs package.
+// Do not use the deprecated WindowsAzure.Storage or Microsoft.Azure.Storage.Blob packages.
+
 open System
 open System.IO
 open Azure.Storage.Blobs // Namespace for Blob storage types