Automated changelog update [skip ci]

Author: kobergj

CHANGELOG.md

@@ -95,6 +95,7 @@ The following sections list the changes for unreleased.
 * Enhancement - Add photo EXIF metadata to search index and WebDAV results: [#11912](https://github.com/owncloud/ocis/pull/11912)
 * Enhancement - Update the traefik image for some deployment examples: [#11915](https://github.com/owncloud/ocis/pull/11915)
 * Enhancement - Add users instances: [#11925](https://github.com/owncloud/ocis/pull/11925)
+* Enhancement - Introduce external shares permission: [#11931](https://github.com/owncloud/ocis/pull/11931)
 
 ## Details
 
@@ -352,6 +353,13 @@ The following sections list the changes for unreleased.
 
    https://github.com/owncloud/ocis/pull/11925
 
+* Enhancement - Introduce external shares permission: [#11931](https://github.com/owncloud/ocis/pull/11931)
+
+   Introduces a permission allowing to share between instances in multi-instance
+   ocis. This permission is by default added to the admin and space-admin role.
+
+   https://github.com/owncloud/ocis/pull/11931
+
 # Changelog for [7.3.1] (2025-11-24)
 
 The following sections list the changes for 7.3.1.