[IMP] sale_coupon: no need of sale_management module for sale_coupon

When installing website_sale_coupon, you are forced to install sale_management,
it shouldn't be the case.

Task Id : 2192587

closes odoo/odoo#46416

Related: odoo/upgrade#861
Signed-off-by: Victor Feyens (vfe) <vfe@odoo.com>

addons/sale_coupon/__manifest__.py

@@ -6,7 +6,7 @@
     'description': """Integrate coupon mechanism in sales orders.""",
     'category': 'Sales/Sales',
     'version': '1.0',
-    'depends': ['sale_management'],
+    'depends': ['sale'],
     'data': [
         'security/sale_coupon_security.xml',
         'security/ir.model.access.csv',