Fix service registration for ZapierFormSubscriptionHookService

Author: acoumb

src/Umbraco.Cms.Integrations.Automation.Zapier/ZapierComposer.cs

@@ -30,6 +30,8 @@ public void Compose(IUmbracoBuilder builder)
 
             builder.Services.AddSingleton<ZapierSubscriptionHookService>();
 
+            builder.Services.AddSingleton<ZapierFormSubscriptionHookService>();
+
             builder.Services.AddSingleton<ZapierService>();
 
             builder.Services.AddScoped<IUserValidationService, UserValidationService>();
@@ -39,6 +41,8 @@ public void Compose(Composition composition)
         {
             composition.Register<ZapierSubscriptionHookService>(Lifetime.Singleton);
 
+            composition.Register<ZapierFormSubscriptionHookService>(Lifetime.Singleton);
+
             composition.Register<ZapierService>(Lifetime.Singleton);
 
             composition.Register<IUserValidationService, UserValidationService>(Lifetime.Scope);