fix delay: delay on exceptions

Author: ChipoDeil

src/IssueInProgressDaysLabeler.Model/Extensions/ApiHelpers.cs

@@ -28,6 +28,8 @@ public static async Task<T> ExecuteWithRetryAndDelay<T>(Func<Task<T>> action, in
                 catch (ApiException)
                 {
                     if (retryCount == 0) throw;
+                    
+                    await Task.Delay(TimeSpan.FromSeconds(1));
                 }
             }
         }