a space was missing and broke everything

Author: JnHs

articles/azure-arc/servers/toc.yml

@@ -48,7 +48,7 @@
       - name: Connect machines using a deployment script
         href: onboard-portal.md
       - name: Connect machines from Windows Admin Center
-         href: onboard-windows-admin-center.md
+        href: onboard-windows-admin-center.md
       - name: Connect machines to Azure Arc with PowerShell
         href: onboard-powershell.md
       - name: Connect machines to Azure Arc with PowerShell DSC