Fix some keyword warnings found in this branch

ee/app/graphql/ee/mutations/boards/scoped_board_mutation.rb

@@ -10,7 +10,7 @@ module EE
         def resolve(**args)
           parsed_params = parse_arguments(args)
 
-          super(parsed_params)
+          super(**parsed_params)
         end
 
         def ready?(**args)

spec/support/shared_examples/services/resource_events/change_milestone_service_shared_examples.rb

@@ -4,7 +4,7 @@ RSpec.shared_examples 'timebox(milestone or iteration) resource events creator'
   let_it_be(:user) { create(:user) }
 
   context 'when milestone/iteration is added' do
-    let(:service) { described_class.new(resource, user, add_timebox_args) }
+    let(:service) { described_class.new(resource, user, **add_timebox_args) }
 
     before do
       set_timebox(timebox_event_class, timebox)
@@ -18,7 +18,7 @@ RSpec.shared_examples 'timebox(milestone or iteration) resource events creator'
   end
 
   context 'when milestone/iteration is removed' do
-    let(:service) { described_class.new(resource, user, remove_timebox_args) }
+    let(:service) { described_class.new(resource, user, **remove_timebox_args) }
 
     before do
       set_timebox(timebox_event_class, nil)