Small doc change.

doc/internal/how_to_release.txt

@@ -25,7 +25,8 @@ Edit ``setup.py`` to contain the newest version number ::
 
  * Change the ``version`` and ``release`` variables to new version number.
  * Change the upper copyright year to the current year if necessary.
- * Update the year in the Theano/LICENSE.txt file.
+
+Update the year in the ``Theano/LICENSE.txt`` file too, if necessary.
 
 ``NEWS.txt`` usually contains the name and date of the release, change them
 too.