[FIX] account: missing dependancy on constraint

It was possible to create inconstancies in accounting entries by forcing to sum apples and pears.

Steps to reproduce
1. create a journal entry using at least one account with a secondary currency set
2. balance and save that move
3. change the secondary currency on the line and force it to a different value than the one on the account
4. save. You'd expect an error pop up but the constraint doesn't trigger and you're allowed to save/post

opw-3340697

closes odoo/odoo#126336

X-original-commit: e6581f39ec5d550db924aa7a86dd12f511f87958
Signed-off-by: William André (wan) <wan@odoo.com>

addons/account/models/account_move_line.py

@@ -1126,7 +1126,7 @@ class AccountMoveLine(models.Model):
     # CONSTRAINT METHODS
     # -------------------------------------------------------------------------
 
-    @api.constrains('account_id', 'journal_id')
+    @api.constrains('account_id', 'journal_id', 'currency_id')
     def _check_constrains_account_id_journal_id(self):
         for line in self.filtered(lambda x: x.display_type not in ('line_section', 'line_note')):
             account = line.account_id