docs(lambda-destination): add onFailure destination example and be explicit about the type of SQS queue that can be used (#17283)

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closes #13793

Author: RichardWatkins1

packages/@aws-cdk/aws-lambda-destinations/README.md

@@ -17,7 +17,7 @@ Destinations can be added by specifying the `onFailure` or `onSuccess` props whe
 The following destinations are supported
 
 * Lambda function
-* SQS queue
+* SQS queue - Only standard SQS queues are supported for failure destinations, FIFO queues are not supported.
 * SNS topic
 * EventBridge event bus
 
@@ -38,6 +38,23 @@ const myFn = new lambda.Function(this, 'Fn', {
 })
 ```
 
+Example with a SQS queue for unsuccessful invocations:
+
+```ts
+// An sqs queue for unsuccessful invocations of a lambda function
+import * as sqs from '@aws-cdk/aws-sqs';
+
+const deadLetterQueue = new sqs.Queue(this, 'DeadLetterQueue');
+
+const myFn = new lambda.Function(this, 'Fn', {
+  runtime: lambda.Runtime.NODEJS_12_X,
+  handler: 'index.handler',
+  code: lambda.Code.fromInline('// your code'),
+  // sqs queue for unsuccessful invocations
+  onFailure: new destinations.SqsDestination(deadLetterQueue),
+});
+```
+
 See also [Configuring Destinations for Asynchronous Invocation](https://docs.aws.amazon.com/lambda/latest/dg/invocation-async.html#invocation-async-destinations).
 
 ### Invocation record