Fix image link

Author: yutanglin16

articles/app-service/manage-custom-dns-buy-domain.md

@@ -184,7 +184,7 @@ After you purchase the App Service Domain, you can still update the domain conta
 
 1. From the left navigation of the domain, select **Advance domain management (preview)**. To update your contact information, click on **Edit contact**.
 
-    :::image type="content" source="./media/custom-dns-web-site-buydomains-web-app/dncmntask-cname-buydomains-updatecontact.png" alt-text="Screenshot showing where to update contact information for a puchased domain." border="true":::
+    :::image type="content" source="./media/custom-dns-web-site-buydomains-web-app/dncmntask-cname-buydomain-updatecontact.png" alt-text="Screenshot showing where to update contact information for a puchased domain." border="true":::
 
 1. A rightside plane will pop up and you will need to update the necessary fields then click on **Submit**.