Correct property type to adjust inconsistency with Zapier

Author: acoumb

src/Umbraco.Cms.Integrations.Automation.Zapier/Controllers/PollingController.cs

@@ -82,7 +82,7 @@ public IEnumerable<PublishedContentDto> GetSampleContent()
 
             return rootNodes.Select(p => new PublishedContentDto
             {
-                Id = p.Id,
+                Id = p.Id.ToString(),
                 Name = p.Name,
                 PublishDate = p.PublishDate.Value.ToString()
             });

src/Umbraco.Cms.Integrations.Automation.Zapier/Models/Dtos/PublishedContentDto.cs

@@ -5,7 +5,7 @@ namespace Umbraco.Cms.Integrations.Automation.Zapier.Models.Dtos
     public class PublishedContentDto
     {
         [JsonProperty("id")]
-        public int Id { get; set; }
+        public string Id { get; set; }
 
         [JsonProperty("name")] 
         public string Name { get; set; }