Merge branch '6.4' into 7.0

* 6.4:
  [Validator] Allow single integer for the `versions` option of the `Uuid` constraint
  [Validator] Allow single constraint to be passed to the constraints option of the `When` constraint

Author: javiereguiluz

reference/constraints/Uuid.rst

@@ -114,7 +114,7 @@ will allow alternate input formats like:
 ``versions``
 ~~~~~~~~~~~~
 
-**type**: ``int[]`` **default**: ``[1,2,3,4,5,6,7,8]``
+**type**: ``int[]|int`` **default**: ``[1,2,3,4,5,6,7,8]``
 
 This option can be used to only allow specific `UUID versions`_ (by default, all
 of them are allowed). Valid versions are 1 - 8. Instead of using numeric values,
@@ -133,6 +133,11 @@ you can also use the following PHP constants to refer to each UUID version:
 
     UUID versions 7 and 8 were introduced in Symfony 6.2.
 
+.. versionadded:: 6.4
+
+    Using a single integer instead of an integer array for this option
+    was introduced in Symfony 6.4.
+
 .. _`Universally unique identifier (UUID)`: https://en.wikipedia.org/wiki/Universally_unique_identifier
 .. _`RFC 4122`: https://tools.ietf.org/html/rfc4122
 .. _`UUID versions`: https://en.wikipedia.org/wiki/Universally_unique_identifier#Versions

reference/constraints/When.rst

@@ -271,9 +271,13 @@ You can also pass custom variables using the `values`_ option.
 ``constraints``
 ~~~~~~~~~~~~~~~
 
-**type**: ``array``
+**type**: ``array|Constraint``
 
-The constraints that are applied if the expression returns true.
+One or multiple constraints that are applied if the expression returns true.
+
+.. versionadded:: 6.4
+
+    Passing a single ``Constraint`` instead of an array was introduced in Symfony 6.4.
 
 .. include:: /reference/constraints/_groups-option.rst.inc