doc(iot): README

packages/@aws-cdk/aws-iot/README.md

@@ -82,7 +82,7 @@ new TopicRule(stack, 'MyTopicRule', {
 });
 ```
 
-### Set state of an Amazon CloudWatch alarm
+### Add action to set state of an Amazon CloudWatch alarm
 
 ```ts
 topicRule.addAction(
@@ -93,13 +93,13 @@ topicRule.addAction(
 );
 ```
 
-### Send data to Amazon CloudWatch Logs
+### Add action to send data to Amazon CloudWatch Logs
 
 ```ts
 topicRule.addAction(new iot.CloudwatchLogsAction(logGroup));
 ```
 
-### Capture an Amazon CloudWatch metric
+### Add action to capture an Amazon CloudWatch metric
 
 ```ts
 topicRule.addAction(new iot.CloudwatchMetricAction({
@@ -111,7 +111,7 @@ topicRule.addAction(new iot.CloudwatchMetricAction({
 }));
 ```
 
-### Write all or part of an MQTT message to an Amazon DynamoDB table
+### Add action to write all or part of an MQTT message to an Amazon DynamoDB table
 
 ```ts
 topicRule.addAction(new iot.DynamoDBAction({
@@ -130,31 +130,31 @@ topicRule.addAction(new iot.DynamoDBv2Action(table));
 
 Dynamodb v2 action is easy to use, but only v1 action supports [substitution templates](https://docs.aws.amazon.com/iot/latest/developerguide/iot-substitution-templates.html).
 
-### Invoke an AWS Lambda function, passing in an MQTT message
+### Add action to invoke an AWS Lambda function, passing in an MQTT message
 
 ```ts
 topicRule.addAction(new actions.LambdaAction(lambdaFn));
 ```
 
-### Republish an MQTT message to another MQTT topic
+### Add action to republish an MQTT message to another MQTT topic
 
 ```ts
 topicRule.addAction(new iot.RepublishAction('test-topic'));
 ```
 
-### Write the data from an MQTT message to an Amazon S3 bucket
+### Add action to write the data from an MQTT message to an Amazon S3 bucket
 
 ```ts
 topicRule.addAction(new iot.S3Action(bucket));
 ```
 
-### Send the data from an MQTT message as an Amazon SNS push notification
+### Add action to send the data from an MQTT message as an Amazon SNS push notification
 
 ```ts
 topicRule.addAction(new iot.SnsAction(topic));
 ```
 
-### Send data from an MQTT message to an Amazon SQS queue
+### Add action to send data from an MQTT message to an Amazon SQS queue
 
 ```ts
 topicRule.addAction(new iot.SqsAction(queue));