replace the via() channel for MS Teams (deprecated)

[Godmartinz]

Description

This reverts the via method back to MicrosoftTeamsChannel.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• [x ] Bug fix (non-breaking change which fixes an issue)

[what-the-diff]

PR Summary

• Notification Class Update
  We have updated the code in the CheckoutAssetNotification.php file. Previously, it was using TeamsNotification::class which was incorrect. Now it has been changed to MicrosoftTeamsChannel::class. This change is important because it will allow us to send notifications through Microsoft Teams properly.