Drop .io from utm_source

Author: chalin

content/en/announcements/2025/kubecon-eu.md

@@ -11,4 +11,4 @@ expiryDate: 2025-04-04
 share<span class="d-none d-sm-inline"> with the Cloud Native community</span>!
 
 [LF]:
-  https://events.linuxfoundation.org/kubecon-cloudnativecon-europe/register/?utm_source=opentelemetry.io&utm_medium=all&utm_campaign=KubeCon-EU-2025&utm_content=slim-banner
+  https://events.linuxfoundation.org/kubecon-cloudnativecon-europe/register/?utm_source=opentelemetry&utm_medium=all&utm_campaign=KubeCon-EU-2025&utm_content=slim-banner