Fix formatting in PlunkEmailSender by adding a newline for improved readability

API/Services/PlunkEmailSender.cs

@@ -22,7 +22,7 @@ public class PlunkEmailSender(HttpClient httpClient, string plunkSecretKey) : IE
             Encoding.UTF8,
             "application/json"
         );
-
+        
         httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", plunkSecretKey);
 
         var response = await httpClient.PostAsync("https://api.useplunk.com/v1/send", jsonContent);