added Ditto 3.6.9 release notes

Author: thjaeckle

documentation/src/main/resources/_data/sidebars/ditto_sidebar.yml

@@ -23,6 +23,9 @@ entries:
       - title: Release Notes
         output: web
         folderitems:
+          - title: 3.6.9
+            url: /release_notes_369.html
+            output: web
           - title: 3.6.8
             url: /release_notes_368.html
             output: web

documentation/src/main/resources/pages/ditto/release_notes_369.md

@@ -0,0 +1,30 @@
+---
+title: Release notes 3.6.9
+tags: [release_notes]
+published: true
+keywords: release notes, announcements, changelog
+summary: "Version 3.6.9 of Eclipse Ditto, released on 16.01.2025"
+permalink: release_notes_369.html
+---
+
+This is a bugfix release, no new features since [3.6.8](release_notes_368.html) were added.
+
+## Changelog
+
+Compared to the latest release [3.6.8](release_notes_368.html), the following changes and bugfixes were added.
+
+### Bugfixes
+This is a complete list of the
+[merged pull requests](https://github.com/eclipse-ditto/ditto/pulls?q=is%3Apr+milestone%3A3.6.9).
+
+#### Fix exceptions in WebSocket due to wrongly formatted added "EntityId" header
+
+Ditto release [3.6.5](release_notes_365.html) introduced an improved log messages for errors in WoT validations, adding
+the Thing's ID to the log message. Internally, a change was needed to always provide the thing's ID as internal header.  
+This added header had however the wrong format, which caused exceptions e.g. in the Ditto WebSocket handling.
+
+This was reported in issue [#2096](https://github.com/eclipse-ditto/ditto/issues/2096) and was fixed via PR 
+[#2097](https://github.com/eclipse-ditto/ditto/pull/2097).
+
+As this is a very critical bug, a bugfix release containing just this one fix is provided: `3.6.9`.
+