Fix Az.EventGrid Syntax Errors (#17593)

Author: CaptainFanZzz

src/EventGrid/EventGrid/help/New-AzEventGridDomainKey.md

@@ -40,7 +40,7 @@ Regenerates the shared access key for an Azure Event Grid Domain.
 Regenerate the key corresponding to key \'key1'\ of Event Grid domain \`Domain1\` in resource group \`MyResourceGroupName\`.
 
 ```powershell
-New-AzEventGridDomainKey -ResourceGroup MyResourceGroupName -DomainName Domain1 -Name key1
+New-AzEventGridDomainKey -ResourceGroupName MyResourceGroupName -DomainName Domain1 -Name key1
 ```
 
 ```output
@@ -54,7 +54,7 @@ Key1                                         Key2
 Regenerate the key corresponding to key \'key1'\ of Event Grid domain \`Domain1\` in resource group \`MyResourceGroupName\`.
 
 ```powershell
-Get-AzEventGridDomain -ResourceGroup MyResourceGroupName -Name Domain1 | New-AzEventGridTopicKey -KeyName "key1"
+Get-AzEventGridDomain -ResourceGroupName MyResourceGroupName -Name Domain1 | New-AzEventGridTopicKey -KeyName "key1"
 ```
 
 ```output
@@ -68,7 +68,7 @@ Key1                                         Key2
 Regenerate the key corresponding to key \'key2'\ of Event Grid domain \`Domain1\` in resource group \`MyResourceGroupName\` using its full resource Id.
 
 ```powershell
-New-AzEventGridDomainKey -ResourceId /subscriptions/$subscriptionId/resourceGroups/MyResourceGroupName/providers/Microsoft.EventGrid/domains/Domain1 -KeyName Key2
+New-AzEventGridDomainKey -DomainResourceId /subscriptions/$subscriptionId/resourceGroups/MyResourceGroupName/providers/Microsoft.EventGrid/domains/Domain1 -KeyName Key2
 ```
 
 ```output