Fix Rails 7.2 serialize deprecation warnings

Pass type as keyword argument in serialize calls, as required from Rails 7.2 onwards.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/models/invoice.rb

@@ -4,7 +4,7 @@ class Invoice < ApplicationRecord
   self.belongs_to_required_by_default = false
 
   belongs_to :order, class_name: 'Spree::Order'
-  serialize :data, Hash, coder: YAML
+  serialize :data, type: Hash, coder: YAML
   before_validation :serialize_order
   after_create :cancel_previous_invoices
   default_scope { order(created_at: :desc) }

app/models/report_rendering_options.rb

@@ -4,5 +4,5 @@ class ReportRenderingOptions < ApplicationRecord
   self.belongs_to_required_by_default = false
 
   belongs_to :user, class_name: "Spree::User"
-  serialize :options, Hash, coder: YAML
+  serialize :options, type: Hash, coder: YAML
 end