[#306] Update release notes

Author: LorenzzoQM

docs/source/release_notes.rst

@@ -29,6 +29,7 @@ Development - |version|
 * Standardize RSO inspection/eclipse naming from ``shadow`` to ``illumination``.
   Custom code should update ``min_shadow_factor`` to ``min_illumination_factor`` and
   ``shadowFactor`` to ``illuminationFactor`` where these names are referenced.
+* Fix target angle rate observation. ``r_BN_P`` is now correctly used instead of ``v_BN_P``.
 
   .. warning::