no need for a named parameter

app/models/hooks/project_hook.rb

 class ProjectHook < WebHook
   include TriggerableHooks
 
-  triggerable_hooks only: [
+  triggerable_hooks [
     :push_hooks,
     :tag_push_hooks,
     :issue_hooks,

app/models/hooks/system_hook.rb

 class SystemHook < WebHook
   include TriggerableHooks
 
-  triggerable_hooks only: [
+  triggerable_hooks [
     :repository_update_hooks,
     :push_hooks,
     :tag_push_hooks,

spec/models/concerns/triggerable_hooks_spec.rb

@@ -4,7 +4,7 @@ RSpec.describe TriggerableHooks do
   before do
     class TestableHook < WebHook
       include TriggerableHooks
-      triggerable_hooks only: [:push_hooks]
+      triggerable_hooks [:push_hooks]
     end
   end