update screenshots and fix intro

Signed-off-by: Hannah Hunter <[email protected]>

Author: hhunter-ms

articles/managed-grafana/how-to-upgrade-grafana-12.md

@@ -12,7 +12,7 @@ ms.topic: how-to
 
 # Upgrade to Grafana 12
 
-Azure Managed Grafana stopped offering Grafana 11 for new resources as of July 31, 2025. This guide provides information about the retirement of Grafana 11 and guides you through updating your Azure Managed Grafana workspace to Grafana 12.
+Azure Managed Grafana support for Grafana 11 for new resources will be discontinued starting June 15, 2026. This guide provides information about the upcoming retirement of Grafana 11 and guides you through updating your Azure Managed Grafana workspace to Grafana 12.
 
 > [!IMPORTANT]
 > We recommend that you familiarize yourself with the [breaking changes introduced in Grafana 12](https://grafana.com/docs/grafana/latest/whatsnew/whats-new-in-v12-0/) and upgrade your workspace to Grafana 12 by June 15, 2026. Workspaces still running Grafana version 11 after this date will be automatically upgraded to Grafana 12.
@@ -34,7 +34,7 @@ In the Azure portal:
   1. In the left menu, under **Settings** select **Configuration**.
   1. Review the Grafana version listed under **Grafana Version**. If version 11 is selected in the dropdown menu, your workspace is on the Grafana version that is reaching end of life and is scheduled for retirement. We recommend that you upgrade your workspace to Grafana 12 by following the steps below. If your Grafana version is Grafana 12, no further action is necessary.
 
-      :::image type="content" source="media/grafana-12-upgrade/check-grafana-version.jpg" alt-text="Screenshot of the Azure platform showing Grafana Version 9.":::
+      :::image type="content" source="media/grafana-12-upgrade/check-grafana-version.png" alt-text="Screenshot of the Azure platform showing Grafana Version 9.":::
 
 ### [Azure CLI](#tab/azure-cli)
 
@@ -66,7 +66,7 @@ In the Azure portal:
 1. Under **Grafana Version**, select **12**.
 1. Select **Save** on top to save the new settings and trigger the upgrade to Grafana version 12.
 
-    :::image type="content" source="media/grafana-12-upgrade/save-upgrade.jpg" alt-text="Screenshot of the Azure portal showing Grafana version 12 selected in the dropdown menu and the Save button highlighted.":::
+    :::image type="content" source="media/grafana-12-upgrade/save-upgrade.png" alt-text="Screenshot of the Azure portal showing Grafana version 12 selected in the dropdown menu and the Save button highlighted.":::
 
 1. A notification appears, indicating that the upgrade is in progress. In the **Overview** page, Grafana’s **Provisioning State** is **Provisioning** until the upgrade is complete. After a few minutes, a notification appears, and the provisioning state becomes **Succeeded**.