Move Timezone under Date constraints

Author: javiereguiluz

reference/constraints.rst

@@ -41,6 +41,7 @@ Validation Constraints Reference
    constraints/Date
    constraints/DateTime
    constraints/Time
+   constraints/Timezone
 
    constraints/Choice
    constraints/Collection
@@ -49,7 +50,6 @@ Validation Constraints Reference
    constraints/Language
    constraints/Locale
    constraints/Country
-   constraints/Timezone
 
    constraints/File
    constraints/Image

reference/constraints/map.rst.inc

@@ -53,6 +53,7 @@ Date Constraints
 * :doc:`Date </reference/constraints/Date>`
 * :doc:`DateTime </reference/constraints/DateTime>`
 * :doc:`Time </reference/constraints/Time>`
+* :doc:`Timezone </reference/constraints/Timezone>`
 
 Choice Constraints
 ~~~~~~~~~~~~~~~~~~
@@ -61,7 +62,6 @@ Choice Constraints
 * :doc:`Language </reference/constraints/Language>`
 * :doc:`Locale </reference/constraints/Locale>`
 * :doc:`Country </reference/constraints/Country>`
-* :doc:`Timezone </reference/constraints/Timezone>`
 
 File Constraints
 ~~~~~~~~~~~~~~~~