feat: corrige carbon data

app/Services/FranchiseeContractService.php

@@ -31,7 +31,7 @@ public function create(array $data): FranchiseeContract
         $data['signature_date'] = $data['start_date'];
 
         if (isset($data['start_date'], $data['end_date'])) {
-            $data['validity_months'] = \Carbon\Carbon::parse($data['start_date'])
+            $data['validity_months'] = (int) \Carbon\Carbon::parse($data['start_date'])
                 ->diffInMonths(\Carbon\Carbon::parse($data['end_date']));
         }