fix formatting in changelog and release 0.20.0

Author: Simon-Laux

CHANGELOG.md

@@ -10,15 +10,16 @@ release date when you use `npm version` (see `README.md`).
 ## [0.20.0][] - 2025-08-08
 
 ### Changed
+
 - remove deprecated descr column fom message table
 - hide "instance started" messages unless `NODE_DEBUG` is set
 
 ### Fixed
+
 - Give better error message when manifest.toml does not exist
 - remove empty space in info panel
 - clearer startup message
 
-
 ## [0.19.0][] - 2025-05-22
 
 ### Added