Change method signature to take keyword args

ee/app/services/ee/system_note_service.rb

@@ -113,7 +113,7 @@ module EE
     end
 
     def notify_via_escalation(noteable, project, recipients, escalation_policy, oncall_schedule)
-      escalations_service(noteable, project).notify_via_escalation(recipients, escalation_policy, oncall_schedule)
+      escalations_service(noteable, project).notify_via_escalation(recipients, escalation_policy: escalation_policy, oncall_schedule: oncall_schedule)
     end
 
     private

ee/app/services/system_notes/escalations_service.rb

@@ -8,7 +8,7 @@ module SystemNotes
       @author = User.alert_bot
     end
 
-    def notify_via_escalation(recipients, escalation_policy, oncall_schedule)
+    def notify_via_escalation(recipients, escalation_policy: nil, oncall_schedule: nil)
       body = if escalation_policy
                "notified #{recipients.map(&:to_reference).to_sentence} of this alert via escalation policy **#{escalation_policy.name}**"
              else

ee/spec/services/system_notes/escalations_service_spec.rb

@@ -9,7 +9,7 @@ RSpec.describe SystemNotes::EscalationsService do
   let_it_be(:author) { User.alert_bot }
 
   describe '#notify_via_escalation' do
-    subject { described_class.new(noteable: noteable, project: project).notify_via_escalation([user, user_2], escalation_policy, oncall_schedule) }
+    subject { described_class.new(noteable: noteable, project: project).notify_via_escalation([user, user_2], escalation_policy: escalation_policy, oncall_schedule: oncall_schedule) }
 
     let_it_be(:escalation_policy) { create(:incident_management_escalation_policy, project: project) }
     let_it_be(:oncall_schedule) { create(:incident_management_oncall_schedule, project: project) }