Update CDN Hosts

Source/domainset/cdn.conf

@@ -3226,6 +3226,8 @@ images.svc.ui.com
 static.ui.com
 img.community.ui.com
 cdn.pkg.svc.ui.com
+cdn.academy.svc.ui.com
+cdn.casestudies.svc.ui.com
 assets.unifi-ai.com
 assets.ecomm.ui.com
 cdn.ecomm.ui.com
@@ -5452,7 +5454,6 @@ conf.config-security.com # cdn immutable cache-control
 static.newsbreak.com
 sub.creamycake.org # Cloudflare R2
 cdn.pagerduty.com
-cdn.academy.svc.ui.com
 mma.prnewswire.com
 mms.businesswire.com
 schema-cf.bc0a.com
@@ -5510,3 +5511,4 @@ static.assets-stash.eet-china.com
 images.rss.app
 assets2.blubrry.com
 cdn.zolplay.com
+.cdn-plain.com