fix(ec): add missing release note to 2.13.0 release (#3717)

* fix(ec): add missing release note to 2.13.0 release

* Update rn-embedded-cluster.md

* Update docs/release-notes/rn-embedded-cluster.md

---------

Co-authored-by: Salah Al Saleh <[email protected]>

Author: emosbaugh

docs/release-notes/rn-embedded-cluster.md

@@ -44,6 +44,7 @@ Released on December 9, 2025
 ### Bug Fixes {#bug-fixes-2-13-0}
 * Fixes an issue where YAML files with a leading document separator fail to parse.
 * Fixes an issue where preflight checks fail when only IPv6 nameservers are configured in resolv.conf.
+* Fixes an issue where switching channels or syncing the license while installing an application update will skip upgrading the infrastructure, causing k0s and extensions to remain outdated.
 
 ## 2.12.0