The example was using the wrong command (#20237)

Author: Ajay1250

src/Monitor/Monitor/help/Update-AzScheduledQueryRule.md

@@ -42,7 +42,7 @@ Update a scheduled query rule.
 ### Example 1: Update scheduled query rule
 ```powershell
 $subscriptionId=(Get-AzContext).SubscriptionId
-New-AzScheduledQueryRule -Name test-rule -ResourceGroupName test-group -Scope "/subscriptions/$subscriptionId/resourceGroups/test-group/providers/Microsoft.Compute/virtualMachines/test-vm" -ActionGroupResourceId "/subscriptions/$subscriptionId/resourceGroups/test-group/providers/microsoft.insights/actionGroups/test-action-group" -AutoMitigate:$false
+Update-AzScheduledQueryRule -Name test-rule -ResourceGroupName test-group -Scope "/subscriptions/$subscriptionId/resourceGroups/test-group/providers/Microsoft.Compute/virtualMachines/test-vm" -ActionGroupResourceId "/subscriptions/$subscriptionId/resourceGroups/test-group/providers/microsoft.insights/actionGroups/test-action-group" -AutoMitigate:$false
 ```
 
 Update scheduled query rule