fix typo

Author: Steve Lee (POWERSHELL HE/HIM) (from Dev Box)

dsc/tests/dsc_config_set.tests.ps1

@@ -1,7 +1,7 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 
-Describe 'dsc config get tests' {
+Describe 'dsc config set tests' {
     It 'can use _exist with resources that support and do not support it' {
         $config_yaml = @"
             `$schema: https://raw.githubusercontent.com/PowerShell/DSC/main/schemas/2023/10/config/document.json