Added single quote to last option for registering

`az provider register --namespace 'Microsoft.AzureArcData'`

Author: EricBuMSFT

docs/sql-server/azure-arc/connect.md

@@ -23,7 +23,7 @@ You can connect your SQL Server instance on premises to Azure Arc by following t
         - Under **Settings**, select **Resource providers**
         - Search for `Microsoft.AzureArcData` and select **Register**
     * Using PowerShell, run `Register-AzResourceProvider -ProviderNamespace Microsoft.AzureArcData`
-    * Using CLI, run `az provider register --namespace 'Microsoft.AzureArcData`
+    * Using CLI, run `az provider register --namespace 'Microsoft.AzureArcData'`
 
 ## Generate a registration script for SQL Server
 
@@ -97,4 +97,4 @@ To disconnect your SQL Server instance from Azure Arc, go to Azure portal, open
 
 * [Configure advanced data security for your SQL Server instance](configure-advanced-data-security.md)
 
-* [Configure on-demand SQL assessment for your SQL Server instance](assess.md)
+* [Configure on-demand SQL assessment for your SQL Server instance](assess.md)