Update formatting and headings in how-to guide

Author: tonyyam23

articles/operator-nexus/howto-check-runtime-version.md

@@ -15,18 +15,18 @@ This how-to guide explains the steps to determine the runtime version of the key
 
 ## Prerequisites
 
-1. The [Install Azure CLI](/cli/azure/install-azure-cli) must be installed.
-2. The `networkcloud` CLI extension is required. If the `networkcloud` extension isn't installed, it can be installed following the steps listed [here](./howto-install-cli-extensions.md)
-3. Access to the Azure portal for the target cluster to be upgraded.
-4. You must be logged in to the same subscription as your target cluster via `az login`
+* The [Install Azure CLI](/cli/azure/install-azure-cli) must be installed.
+* The `networkcloud` CLI extension is required. If the `networkcloud` extension isn't installed, it can be installed following the steps listed [here](./howto-install-cli-extensions.md)
+* Access to the Azure portal for the target cluster to be upgraded.
+* You must be logged in to the same subscription as your target cluster via `az login`
 
 ## Check current Cluster runtime version
 
-### Via Portal
+### Via Azure portal
 
 To check current cluster runtime version, navigate to the cluster in the Azure portal. In the cluster's overview pane, navigate to the ***Properties*** tab and look for "Cluster version"
 
-:::image type="content" source="media\cluster-runtime-version-screenshot.png" alt-text="Screenshot of cluster runtime version" lightbox="media\cluster-runtime-version-screenshot.png":::
+:::image type="content" source="media\cluster-runtime-version-screenshot.png" alt-text="Screenshot of cluster runtime version." lightbox="media\cluster-runtime-version-screenshot.png":::
 
 ### Via Azure CLI
 
@@ -42,10 +42,10 @@ az networkcloud cluster show --name "clusterName" --resource-group "cls_resource
 
 ## Check current Fabric runtime version
 
-### Via Portal
+### Via Azure portal
 To check current fabric runtime version, navigate to the fabric in the Azure portal. In the fabric's overview pane, navigate to the ***Properties*** tab and look for "Fabric version"
 
-:::image type="content" source="media\fabric-runtime-version-screenshot.png" alt-text="Screenshot of fabric runtime version" lightbox="media\fabric-runtime-version-screenshot.png":::
+:::image type="content" source="media\fabric-runtime-version-screenshot.png" alt-text="Screenshot of fabric runtime version." lightbox="media\fabric-runtime-version-screenshot.png":::
 
 ### Via Azure CLI
 Current Runtime fabric version is retrievable via the Azure CLI: