Fix typo in package name in the doc (#1700)

Author: stof

docs/clients/index.md

@@ -150,7 +150,7 @@ for more information.
 | [Comprehend](./comprehend.md)               | [async-aws/comprehend](https://packagist.org/packages/async-aws/comprehend)                               |
 | [DynamoDb](./dynamodb.md)                   | [async-aws/dynamo-db](https://packagist.org/packages/async-aws/dynamo-db)                                 |
 | [ECR](./ecr.md)                             | [async-aws/ecr](https://packagist.org/packages/async-aws/ecr)                                             |
-| [ElastiCache](./elasti-cache.md)            | [async-aws/elasti-cach](https://packagist.org/packages/async-aws/elasti-cache)                            |
+| [ElastiCache](./elasti-cache.md)            | [async-aws/elasti-cache](https://packagist.org/packages/async-aws/elasti-cache)                            |
 | [EventBridge](./event-bridge.md)            | [async-aws/event-bridge](https://packagist.org/packages/async-aws/event-bridge)                           |
 | [Firehose](./firehose.md)                   | [async-aws/event-bridge](https://packagist.org/packages/async-aws/firehose)                               |
 | [IAM](./iam.md)                             | [async-aws/iam](https://packagist.org/packages/async-aws/iam)                                             |