README: Add link to image registry in the new notice section

Author: joaquimrocha

README.md

@@ -5,12 +5,12 @@
   </picture>
 </h1>
 
+> **NOTICE:** We have recently moved the project under the Kubernetes SIG UI (and the repo under the _kubernetes-sigs_ org). Container images are still at [ghcr.io](https://github.com/orgs/headlamp-k8s/packages). Please bear with us while we may experience some broken links.
+
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-**NOTICE:** We have just moved the project under the Kubernetes SIG UI (and the repo under the _kubernetes-sigs_ org). Please bear with us while we may experience some broken links.
-
 Headlamp is an easy-to-use and extensible Kubernetes web UI.
 
 Headlamp was created to blend the traditional feature set of other web UIs/dashboards