Update toc.yml

Author: mgreenegit

articles/governance/machine-configuration/toc.yml

@@ -25,7 +25,7 @@ items:
     - name: Migrating from Azure Automation DSC
       href: ./whats-new/migrating-from-azure-automation.md
     - name: Migrating from Azure DSC Extension
-      href: ./whats-new/migrating-from-azure-dsc-extension.md
+      href: ./whats-new/migrating-from-dsc-extension.md
     - name: Behavioral changes for PowerShell DSC
       href: ./whats-new/psdsc-in-machine-configuration.md