Image fix 12 3 release notes (#11419)

* Add files via upload

* tool-tip image fix

* addition 12.3 to overview

docs/release-notes/12-3-0/README.md

@@ -68,7 +68,9 @@ These changes to scheduling will not impact work packages created before the rel
 
 The new and additional tool tips in the OpenProject application will make the navigation easier for users that are not yet very familiar with OpenProject. The tool tips make clear what happens when the user clicks on a certain button.  
 
-![hover over select a project and tool tip view all projects comes up](tool tip.png)
+![hover over select a project and tool tip view all projects comes up](tool-tip.png)
+
+
 
 ##  List of all bug fixes and changes
 

docs/release-notes/README.md

@@ -14,6 +14,12 @@ 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 -->
 
+## 12.3.0
+
+Release date: 2022-10-10
+
+[Release Notes](12-3-0/)
+
 ## 12.2.5
 
 Release date: 2022-10-04