fix screenshot

Author: asudbring

articles/virtual-network/manage-route-table.md

@@ -338,7 +338,7 @@ You can determine the next hop type between a virtual machine and the IP address
 
 1. In the **Network Watcher | Next hop** page:
 
-    :::image type="content" source="./media/manage-route-table/add-route.png" alt-text="Screenshot of add a route page for a route table.":::
+    :::image type="content" source="./media/manage-route-table/next-hop.png" alt-text="Screenshot of next hop in Network Watcher.":::
 
     | Setting | Value |
     |--|--|