Updated release notes

Author: ReeceHumphreys

docs/source/Support/bskReleaseNotes.rst

@@ -26,6 +26,7 @@ Basilisk Release Notes
 
 Version |release|
 -----------------
+- Improved documentation structure by separating build from source instructions from pip installation instructions.
 - Added custom reaction wheel: "NanoAvionics RW0" to ``src/utilities/simIncludeRW.py``
 - Added TLE handling utilities in :ref:`tleHandling` to parse TLE files and convert to orbital elements
 - Removed deprecated use of astro constants from ``src/utilities/astroFunction.py``.