[Validator] Document the match option of Choice constraint

Author: javiereguiluz

reference/forms/types/choice.rst

@@ -195,6 +195,19 @@ correct types will be assigned to the model.
 
 .. include:: /reference/forms/types/options/group_by.rst.inc
 
+match
+~~~~~
+
+**type**: ``boolean`` **default**: ``true``
+
+When this option is ``false``, the constraint checks that the given value is
+not one of the values defined in the ``choices`` option. In practice, it makes
+the ``Choice`` constraint behave like a ``NotChoice`` constraint.
+
+.. versionadded:: 6.2
+
+    The ``match`` option was introduced in Symfony 6.2.
+
 .. include:: /reference/forms/types/options/multiple.rst.inc
 
 .. include:: /reference/forms/types/options/placeholder.rst.inc