[FIX] base: set cureency position "before" for JPY

As a convention, JPY currency symbol normally shows before the amount.

closes odoo/odoo#34113

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

odoo/addons/base/res/res_currency_data.xml

@@ -174,6 +174,7 @@
             <field name="symbol">¥</field>
             <field name="rounding">1.00</field>
             <field name="active" eval="False"/>
+            <field name="position">before</field>
         </record>
 
         <record id="BGN" model="res.currency">