Merge pull request #134381 from PramodValavala-MSFT/patch-129

(AzureCXP) update command for deprecation

Author: PRMerger6

articles/azure-signalr/signalr-howto-event-grid-integration.md

@@ -76,7 +76,7 @@ To deploy the sample app, set `SITE_NAME` to a unique name for your web app, and
 ```azurecli-interactive
 SITE_NAME=<your-site-name>
 
-az group deployment create \
+az deployment group create \
     --resource-group $RESOURCE_GROUP_NAME \
     --template-uri "https://raw.githubusercontent.com/Azure-Samples/azure-event-grid-viewer/master/azuredeploy.json" \
     --parameters siteName=$SITE_NAME hostingPlanName=$SITE_NAME-plan