small editorial updates

Author: glynnniall

articles/azure-functions/functions-zone-redundancy.md

@@ -27,7 +27,7 @@ Availability zone configuration for Azure Functions depends on your [Functions h
 
 ## Prerequisites
 
-Before configuring zone redundancy, review the requirements and details listed in [Reliability in Azure Functions - Resilience to availability zone failures](/azure/reliability/reliability-functions#resilience-to-availability-zone-failures). 
+Before configuring zone redundancy, review the requirements and details listed in [Reliability in Azure Functions - Resilience to availability zone failures](/azure/reliability/reliability-functions#resilience-to-availability-zone-failures).
 
 ::: zone pivot="premium-plan"
 
@@ -427,15 +427,15 @@ You can't change the availability zone support of an existing Elastic Premium pl
 
 ### Downtime
 
-The downtime required for this migration depends on how you choose to redirect traffic during the migration from your old app to your new availability zone-enabled function app:
+The downtime required for this migration depends on how you redirect traffic during the migration to your new availability zone-enabled function app:
 
 - Consider HTTP-based functions that use an [Application Gateway](/azure/app-service/networking/app-gateway-with-service-endpoints), [custom domain](/azure/app-service/app-service-web-tutorial-custom-domain), or [Azure Front Door](/azure/frontdoor/front-door-overview). In this case, downtime depends on how long it takes to update those respective services with the new app information.
 - You might also be routing traffic to multiple apps at the same time using a service such as [Azure Traffic Manager](/azure/app-service/web-sites-traffic-manager). In this scenario, you can only fully switch to the new zone-redundant app after everything is deployed and tested fully.
 - For message-based functions, you should [write defensive functions](/azure/azure-functions/performance-reliability#write-defensive-functions) to ensure messages aren't lost during the migration.
 
 ### Migration steps
 
-To enable an existing Premium plan function app to use availability zones, you must redeploy your project files to a new function app hosted in an zone-redundant Premium plan. Follow these steps:
+To enable an existing Premium plan function app to use availability zones, redeploy your project files to a new function app hosted in an zone-redundant Premium plan. Follow these steps:
 
 1. If you're already hosted in a Premium plan in a supported region, you can reuse your existing resource group and skip to the next step. Otherwise, create a new resource group in a supported region. For a list of regions that support zone redundancy for Azure Functions Premium plans, see [Reliability in Azure Functions - Resilience to availability zone failures - Requirements](/azure/reliability/reliability-functions#requirements).
 1. Create a zone-redundant Premium plan in a supported region.