Update release notes

Author: juan-g-bonilla

docs/source/Support/bskReleaseNotes.rst

@@ -70,7 +70,8 @@ Version |release|
 - Added support for showing ``QuadMap`` quadrilateral surface meshes in Vizard, with scenario :ref:`scenarioQuadMaps` detailing usage. Allows users to draw quads on celestial bodies and spacecraft.
 - Added ``fixedframe2lla()`` function in :ref:`vizSupport` which is useful for computing QuadMap mesh interpolations
 - Added QuadMap mesh support functions (:ref:`quadMapSupport`) for displaying camera FOV boxes as projected on the surface of a reference ellipsoid, and drawing rectangular latitude/longitude defined regions.
-
+- :beta:`Mujoco Support`: Added ``StatefulSysModel`` for models in the dynamics task of ``MJScene`` that need to declare
+  continuous-time states. Modified :ref:`scenarioDeployPanels` to illustrate the use of ``StatefulSysModel``.
 
 Version  2.6.0  (Feb. 21, 2025)
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