docs: adds comments about 8vCpu and 16vCpu options for Fargate servic…

…es in @aws-cdk/aws-ecs-patterns (#22595)

----

Silly CR to add docs about the new 8vCPU and 16vCPU options for Fargate services and tasks.
See: https://docs.aws.amazon.com/AmazonECS/latest/developerguide/AWS_Fargate.html#fargate-tasks-size 

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### Adding new Unconventional Dependencies:

* [ ] This PR adds new unconventional dependencies following the process described [here](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md/#adding-new-unconventional-dependencies)

### New Features

* [ ] Have you added the new feature to an [integration test](https://github.com/aws/aws-cdk/blob/main/INTEGRATION_TESTS.md)?
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packages/@aws-cdk/aws-ecs-patterns/lib/base/fargate-service-base.ts

@@ -26,6 +26,10 @@ export interface FargateServiceBaseProps {
    *
    * 4096 (4 vCPU) - Available memory values: Between 8GB and 30GB in 1GB increments
    *
+   * 8192 (8 vCPU) - Available memory values: Between 16GB and 60GB in 4GB increments
+   *
+   * 16384 (16 vCPU) - Available memory values: Between 32GB and 120GB in 8GB increments
+   *
    * This default is set in the underlying FargateTaskDefinition construct.
    *
    * @default 256
@@ -48,6 +52,10 @@ export interface FargateServiceBaseProps {
     *
     * Between 8192 (8 GB) and 30720 (30 GB) in increments of 1024 (1 GB) - Available cpu values: 4096 (4 vCPU)
     *
+    * Between 16384 (16 GB) and 61440 (60 GB) in increments of 4096 (4 GB) - Available cpu values: 8192 (8 vCPU)
+    *
+    * Between 32768 (32 GB) and 122880 (120 GB) in increments of 8192 (8 GB) - Available cpu values: 16384 (16 vCPU)
+    *
     * This default is set in the underlying FargateTaskDefinition construct.
     *
     * @default 512

packages/@aws-cdk/aws-ecs-patterns/test/fargate/scheduled-fargate-task.test.ts

@@ -288,6 +288,30 @@ test('Scheduled Fargate Task - with subnetSelection defined', () => {
   });
 });
 
+test('Scheduled Fargate Task - can take 8 vCpu and 60GB memory sizes', () => {
+  // GIVEN
+  const stack = new cdk.Stack();
+  const vpc = new ec2.Vpc(stack, 'Vpc', { maxAzs: 1 });
+  const cluster = new ecs.Cluster(stack, 'EcsCluster', { vpc });
+
+  new ScheduledFargateTask(stack, 'ScheduledFargateTask', {
+    cluster,
+    scheduledFargateTaskImageOptions: {
+      image: ecs.ContainerImage.fromRegistry('henk'),
+      memoryLimitMiB: 61440,
+      cpu: 8192,
+    },
+    schedule: events.Schedule.expression('rate(1 minute)'),
+  });
+
+  // THEN
+  Template.fromStack(stack).hasResourceProperties('AWS::ECS::TaskDefinition', Match.objectLike({
+    Cpu: '8192',
+    Memory: '61440',
+  }),
+  );
+});
+
 test('Scheduled Fargate Task - with platformVersion defined', () => {
   // GIVEN
   const stack = new cdk.Stack();