Update .NET guidance: recommend .NET 8 LTS over EOL .NET 7

The iotedgedev tool template still defaults to .NET 7.0, which reached end
of support in May 2024. Updated text to recommend updating to .NET 8.0 LTS
instead of presenting it as an optional alternative.

Author: jlian

articles/iot-edge/tutorial-develop-for-linux.md

@@ -3,7 +3,7 @@ title: Develop Azure IoT Edge modules using Visual Studio Code tutorial
 description: 'Develop IoT Edge modules with Visual Studio Code: Follow step-by-step instructions to create, build, and deploy modules using Azure IoT Edge tools.'
 author: sethmanheim
 ms.author: sethm
-ms.date: 11/03/2025
+ms.date: 02/20/2026
 ms.topic: tutorial
 ms.service: azure-iot-edge
 services: iot-edge
@@ -1029,7 +1029,7 @@ Use the `dotnet publish` command to build the container image for Linux and amd6
 dotnet publish --os linux --arch x64 /t:PublishContainer
 ```
 
-Currently, the **iotedgedev** tool template targets .NET 7.0. If you want to target a different version of .NET, you can edit the **filtermodule.csproj** file and change the `TargetFramework` and `PackageReference` values. For example to target .NET 8.0, your **filtermodule.csproj** file should look like this:
+Currently, the **iotedgedev** tool template targets .NET 7.0, which reached end of support in May 2024. Update the project to target .NET 8.0 (LTS, supported through November 2026) by editing the **filtermodule.csproj** file and changing the `TargetFramework` and `PackageReference` values. Your **filtermodule.csproj** file should look like this:
 
 ```xml
 <Project Sdk="Microsoft.NET.Sdk.Worker">