fix: README

packages/aws-cdk-lib/aws-ecs/README.md

@@ -189,7 +189,7 @@ cluster.addAsgCapacityProvider(capacityProvider);
 The following code retrieve the Amazon Resource Names (ARNs) of tasks that are a part of a specified ECS cluster.
 It's useful when you want to grant permissions to a task to access other AWS resources.
 
-```typescript
+```ts
 declare cluster: Cluster;
 declare taskDefinition: TaskDefinition;
 const taskARNs = cluster.arnForTasks('*'); // arn:aws:ecs:<region>:<regionId>:task/<clusterName>/*
@@ -203,7 +203,6 @@ taskDefinition.addToTaskRolePolicy(
 )
 ```
 
-
 ### Bottlerocket
 
 [Bottlerocket](https://aws.amazon.com/bottlerocket/) is a Linux-based open source operating system that is