[CLN] estate: rename onchange method to match coding guidelines

Author: robal-odoo

estate/models/estate_property.py

@@ -58,7 +58,7 @@ def _compute_best_price(self) -> None:
 
     # Methods that trigger on changes
     @api.onchange("garden")
-    def _compute_garden_defaults(self) -> None:
+    def _onchange_garden_defaults(self) -> None:
         if self.garden:
             self.garden_area = 10
             self.garden_orientation = "north"