docs(lambda-event-sources): fix typos (#32872)

### Issue # (if applicable)

None

### Reason for this change

Fixed typos in code comments.


### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: andyu17

packages/aws-cdk-lib/aws-lambda-event-sources/lib/kafka.ts

@@ -24,7 +24,7 @@ export interface KafkaEventSourceProps extends BaseStreamEventSourceProps {
    */
   readonly secret?: secretsmanager.ISecret;
   /**
-   * The identifier for the Kafka consumer group to join. The consumer group ID must be unique among all your Kafka event sources. After creating a Kafka event source mapping with the consumer group ID specified, you cannot update this value.  The value must have a lenght between 1 and 200 and full the pattern '[a-zA-Z0-9-\/*:_+=.@-]*'.
+   * The identifier for the Kafka consumer group to join. The consumer group ID must be unique among all your Kafka event sources. After creating a Kafka event source mapping with the consumer group ID specified, you cannot update this value.  The value must have a length between 1 and 200 and full the pattern '[a-zA-Z0-9-\/*:_+=.@-]*'.
    * @see https://docs.aws.amazon.com/lambda/latest/dg/with-msk.html#services-msk-consumer-group-id
    *
    * @default - none