Improved docs for RetryPolicy.NonRetryableErrorTypes (#252)

Author: petrkoutnycz

src/Temporalio/Common/RetryPolicy.cs

@@ -33,6 +33,7 @@ public record RetryPolicy
         /// <summary>
         /// Gets or sets the collection of error types that are not retryable.
         /// </summary>
+        /// <remarks>Refers to the <see cref="Temporalio.Exceptions.ApplicationFailureException.ErrorType"/> property.</remarks>
         public IReadOnlyCollection<string>? NonRetryableErrorTypes { get; set; }
 
         /// <summary>