fix: fix an issue with Invalid time value

connectors/src/connectors/zendesk/lib/sync_ticket.ts

@@ -177,7 +177,7 @@ ${comments
   .map((comment) => {
     const author = users.find((user) => user.id === comment.author_id);
     return `
-[${new Date(comment.created_at).toISOString()}] ${
+[${new Date(Number(comment?.created_at)).toISOString()}] ${
       author ? `${author.name} (${author.email})` : "Unknown User"
     }:
 ${comment.body}`;