doc: add release note

Author: daniel-rdt

doc/release_notes.md

@@ -65,6 +65,8 @@
 
 * Create rules overview for SB and CBA rules ([761](https://github.com/open-energy-transition/open-tyndp/pull/761))
 
+* Modify configuration section for open-tyndp specific config hierarchy and move section to Home tab under Getting Started ([#826](https://github.com/open-energy-transition/open-tyndp/pull/826))
+
 **Developers Note**
 
 * Change GitHub issue templates to comply with ISO security checks ([#714](https://github.com/open-energy-transition/open-tyndp/pull/714), [#730](https://github.com/open-energy-transition/open-tyndp/pull/730)).