Update release notes

Author: leahkiner

docs/source/Support/bskReleaseNotes.rst

@@ -41,6 +41,9 @@ Version |release|
   automatically increment the patch number. This allows users to reference/require specific versions of Basilisk 
   outside of the release cycle.
 - updated plotting of ``opNav`` example scenarios to work again with latest version of ``matplotlib``
+- Refactored the :ref:`PrescribedTransMsgPayload` message by renaming the message to
+  :ref:`TranslatingRigidBodyMsgPayload` and renaming the message variables from ``scalarPos`` and ``scalarVel`` to
+  ``rho`` and ``rhoDot``
 
 Version 2.2.1 (Dec. 22, 2023)
 -----------------------------