[IMP] fleet: Change long description of fleet.vehicle.log.contract model

Purpose of the task is the current name(_description) of model
fleet.vehicle.log.contract is too long and confusion.

So in this commmit, Rename model fleet.vehicle.log.contract
name(_description) to 'Vehicle Contract'.

closes odoo/odoo#52176

Taskid: 2267547
Closes: #52176
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/fleet/models/fleet_vehicle_cost.py

@@ -9,7 +9,7 @@ from dateutil.relativedelta import relativedelta
 class FleetVehicleLogContract(models.Model):
     _inherit = ['mail.thread', 'mail.activity.mixin']
     _name = 'fleet.vehicle.log.contract'
-    _description = 'Contract information on a vehicle'
+    _description = 'Vehicle Contract'
     _order = 'state desc,expiration_date'
 
     def compute_next_year_date(self, strdate):