Prepend www to URL of bnr.ro website

Closes #14784
(grafted from a3b875e9b443c5efffcc84a4fc3b69069e949fe8)

--HG--
branch : 8.0

modules/currency_ro/currency.py

@@ -11,8 +11,8 @@ from trytond.modules.currency.currency import CronFetchError
 from trytond.pool import PoolMeta
 from trytond.pyson import Eval, If
 
-URL_10DAYS = 'https://bnr.ro/nbrfxrates10days.xml'
-URL_YEAR = 'https://bnr.ro/files/xml/years/nbrfxrates%s.xml'
+URL_10DAYS = 'https://www.bnr.ro/nbrfxrates10days.xml'
+URL_YEAR = 'https://www.bnr.ro/files/xml/years/nbrfxrates%s.xml'
 
 
 class Cron(metaclass=PoolMeta):

modules/currency_ro/doc/design.rst

@@ -10,7 +10,7 @@ Scheduled Rate Updates
 ======================
 
 When the *Currency RO Module* is activated, the `Romanian National Bank
-<https://bnr.ro/>`_ is added as source.
+<https://www.bnr.ro/>`_ is added as source.
 If it is selected then only the Romanian Leu can be used as a base currency.
 
 .. seealso::