[FIX] account: journal dashboard graph wrong value

OPW 1918926

Current behavior:
  The sql query groups by date,id in a intermediary table instead of the result. This allows to get data in the wrong order if the statements were not produced sequentially. The fill values are computed in the wrong order and may override correct values.

Desired behavior:
  There is no override of the values correctly computed.

closes odoo#29936

addons/account/models/account_journal_dashboard.py

@@ -46,9 +46,9 @@ def get_line_graph_datas(self):
                                 WHERE c.journal_id = %s 
                                     AND c.date > %s 
                                     AND c.date <= %s 
-                                    GROUP BY date, id 
-                                    ORDER BY date, id) AS b 
-                        WHERE a.id = b.stmt_id;"""
+                                    GROUP BY date) AS b
+                        WHERE a.id = b.stmt_id
+                        ORDER BY date;"""
 
         self.env.cr.execute(query, (self.id, last_month, today))
         bank_stmt = self.env.cr.dictfetchall()