[Validator] Add "ltrim" and "rtrim" options to the Uuid constraint page

Author: renan-taranto

reference/constraints/Uuid.rst

@@ -117,6 +117,7 @@ The following PHP constants can also be used:
 
 All five versions are allowed by default.
 
+.. include:: /reference/constraints/_ltrim-rtim-options.rst.inc
 .. include:: /reference/constraints/_payload-option.rst.inc
 
 .. _`Universally unique identifier (UUID)`: http://en.wikipedia.org/wiki/Universally_unique_identifier