[FIX] point_of_sale: update method name to avoid conflict with another method

Because of same method name point of sale's onchange method overrides sale's
onchange method. Sale's method is therefore not called anymore.

Fix related to commit https://github.com/odoo/odoo/commit/e434690fe3adf884222b84e16dac3b3dcc0b12ad. See task/issue ID #1854683.
Closes #25116.

addons/point_of_sale/models/res_config_settings.py

@@ -16,7 +16,7 @@ class ResConfigSettings(models.TransientModel):
         ], string="POS Pricelists", config_parameter='point_of_sale.pos_pricelist_setting')
 
     @api.onchange('pos_sales_price')
-    def _onchange_sale_price(self):
+    def _onchange_pos_sales_price(self):
         if not self.pos_sales_price:
             self.pos_pricelist_setting = False
         if self.pos_sales_price and not self.pos_pricelist_setting: