provide Ditto 3.5.1 release notes

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

@@ -23,6 +23,9 @@ entries:
       - title: Release Notes
         output: web
         folderitems:
+          - title: 3.5.1
+            url: /release_notes_351.html
+            output: web
           - title: 3.5.0
             url: /release_notes_350.html
             output: web

documentation/src/main/resources/pages/ditto/release_notes_351.md

@@ -0,0 +1,50 @@
+---
+title: Release notes 3.5.1
+tags: [release_notes]
+published: true
+keywords: release notes, announcements, changelog
+summary: "Version 3.5.1 of Eclipse Ditto, released on 30.01.2024"
+permalink: release_notes_351.html
+---
+
+This is a bugfix release, no new features since [3.5.0](release_notes_350.html) were added.
+
+## Changelog
+
+Compared to the latest release [3.5.0](release_notes_350.html), the following changes and bugfixes were added.
+
+### Changes
+
+
+### Bugfixes
+
+This is a complete list of the
+[merged pull requests](https://github.com/eclipse-ditto/ditto/pulls?q=is%3Apr+milestone%3A3.5.1).
+
+#### Fix when using Policy Imports, the Ditto search index might lose data
+
+Bug [#1882](https://github.com/eclipse-ditto/ditto/issues/1882) was introduced due to an unforeseen side effect introduced by a
+[bugfix for Ditto 3.5.0](https://github.com/eclipse-ditto/ditto/pull/1872).  
+PR [#1883](https://github.com/eclipse-ditto/ditto/pull/1883) provides a fix for this.
+
+When making use of [Policy Imports](basic-policy.html#policy-imports) it is strongly advised to skip Ditto 3.5.0 and
+directly use Ditto 3.5.1.
+
+
+### 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.
+
+#### Fix hook-scripts configmap missing in Helm pre-upgrade Hooks
+
+The newly introduced [calculation of pod deletion cost via a Helm hook](https://github.com/eclipse-ditto/ditto/pull/1871)
+was missing setting up the configmap containing the script properly.  
+This was fixed in [#1880](https://github.com/eclipse-ditto/ditto/pull/1880).  
+PR [#1886](https://github.com/eclipse-ditto/ditto/pull/1886) in addition fixes a wrong name variable used for the configmap.
+
+#### Fix Helm config for operatorMetrics not having defined a "scrapeInterval"
+
+When using the newly introduced [operator metrics](installation-operating.html#operator-defined-custom-metrics) and
+configuring via the Helm chart, there was an issue when no `scrapeInterval` was provided for a metric.  
+This was fixed in [#1884](https://github.com/eclipse-ditto/ditto/pull/1884).