added Ditto 2.4.2 release notes

Signed-off-by: Thomas Jaeckle <thomas.jaeckle@bosch.io>

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

@@ -23,6 +23,9 @@ entries:
       - title: Release Notes
         output: web
         folderitems:
+          - title: 2.4.2
+            url: /release_notes_242.html
+            output: web
           - title: 2.4.1
             url: /release_notes_241.html
             output: web

documentation/src/main/resources/pages/ditto/release_notes_242.md

@@ -0,0 +1,23 @@
+---
+title: Release notes 2.4.2
+tags: [release_notes]
+published: true
+keywords: release notes, announcements, changelog
+summary: "Version 2.4.2 of Eclipse Ditto, released on 07.09.2022"
+permalink: release_notes_242.html
+---
+
+This is a bugfix release, no new features since [2.4.1](release_notes_241.html) were added.
+
+## Changelog
+
+Compared to the latest release [2.4.1](release_notes_241.html), the following bugfixes were added.
+
+### Bugfixes
+
+This is a complete list of the
+[merged pull requests](https://github.com/eclipse/ditto/pulls?q=is%3Apr+milestone%3A2.4.2), including the fixed bugs.
+
+#### [Skip hostname verification check with self signed in kafka](https://github.com/eclipse/ditto/pull/1475)
+
+Another required fix in order to connect to a Kafka with a self signed certificate.