Updated release note text to add reason for change

Author: oruebel

docs/language/source/specification_language_release_notes.rst

@@ -4,7 +4,9 @@ Release Notes
 
 Version 2.0.1 (March, 2019)
 ---------------------------------
-* Added support for specifying a ``title`` and ``doc`` for ``source`` files as part of the ``schema`` portion of a ``namespace`` specification
+* Added support for specifying a ``title`` and ``doc`` for ``source`` files as part of the ``schema`` portion of a ``namespace`` specification.
+  This was added to improve documentation of individual source files and to support sorting of types by source file with meaningful titles
+  and text as part of autogenerated docs.
 
 
 Version 2.0.0 (January, 2019)