Add release-notes file

docs/release-notes/11-3-4/README.md

@@ -0,0 +1,18 @@
+---
+title: OpenProject 11.3.4
+sidebar_navigation:
+    title: 11.3.4
+release_version: 11.3.4
+release_date: 2021-07-29
+---
+
+# OpenProject 11.3.4
+
+Release date: 2021-07-29
+
+We released [OpenProject 11.3.4](https://community.openproject.com/versions/1488).
+The release contains several bug fixes and we recommend updating to the newest version.
+
+<!--more-->
+#### Bug fixes and changes
+

docs/release-notes/README.md

@@ -16,6 +16,13 @@ Stay up to date and get an overview of the new features included in the releases
 <!--- New release notes are generated below. Do not remove comment. -->
 <!--- RELEASE MARKER -->
 
+## 11.3.4
+
+Release date: 2021-07-29
+
+[Release Notes](11-3-4/)
+
+
 ## 11.3.3
 
 Release date: 2021-07-20