Provide Ditto 3.5.5 release notes

Signed-off-by: Thomas Jäckle <thomas.jaeckle@beyonnex.io>

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

@@ -23,6 +23,9 @@ entries:
       - title: Release Notes
         output: web
         folderitems:
+          - title: 3.5.5
+            url: /release_notes_355.html
+            output: web
           - title: 3.5.4
             url: /release_notes_354.html
             output: web

documentation/src/main/resources/pages/ditto/release_notes_355.md

@@ -0,0 +1,43 @@
+---
+title: Release notes 3.5.5
+tags: [release_notes]
+published: true
+keywords: release notes, announcements, changelog
+summary: "Version 3.5.5 of Eclipse Ditto, released on 14.05.2024"
+permalink: release_notes_355.html
+---
+
+This is a bugfix release, no new features since [3.5.4](release_notes_354.html) were added.
+
+## Changelog
+
+Compared to the latest release [3.5.4](release_notes_354.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%3A3.5.5).
+
+#### Fix that not all placeholders were supported in connection target filtering
+
+Issue [#1931](https://github.com/eclipse-ditto/ditto/issues/1931) found out that some placeholders can not be used in RQL
+`filter` expression of a connection target, e.g. `feature:id`.  
+This was fixed in PR [#1932](https://github.com/eclipse-ditto/ditto/pull/1932).
+
+#### Fix that removing fields in a merge update with a regex does not work in several cases
+
+Issue [#1939](https://github.com/eclipse-ditto/ditto/issues/1939) revealed a bug in the functionality of
+[removing fields in a merge update based on a regex](httpapi-concepts.html#removing-fields-in-a-merge-update-with-a-regex), so that
+only very special fields could be removed and only when not being used via the HTTP API.  
+PR [#1941](https://github.com/eclipse-ditto/ditto/pull/1941) fixed that.
+
+
+### Helm Chart
+
+The [Ditto Helm Chart](https://github.com/eclipse-ditto/ditto/tree/master/deployment/helm) contained some configuration 
+bugs and enhancements which are also addressed with this bugfix release.
+
+#### Make nginx timeout configurable in helm chart
+
+In PR [#1934](https://github.com/eclipse-ditto/ditto/pull/1934) a configuration option to configure the nginx timeout
+was provided to the Ditto Helm chart, resolving issue [#1928](https://github.com/eclipse-ditto/ditto/issues/1928).