Update front-door-cdn-comparison.md

added retirement banners

Author: Harikrishnan-M-B

articles/frontdoor/front-door-cdn-comparison.md

@@ -17,7 +17,11 @@ Azure Front Door and Azure CDN are both Azure services that offer global content
 
 > [!NOTE]
 > To switch between tiers, you will need to recreate the Azure Front Door profile. You can use the [**migration capability**](migrate-tier.md) to move your existing Azure Front Door profile to the new tier. For more information about upgrading from Standard to Premium, see [**upgrade capability**](tier-upgrade.md).
-> 
+>
+
+[!INCLUDE [Azure Front Door (classic) retirement notice](../../includes/front-door-classic-retirement.md)]
+
+[!INCLUDE [Azure CDN from Microsoft (classic) retirement notice](../../includes/cdn-classic-retirement.md)]
 
 ## Service comparison