docs(ecs): add note for windows tasks CPU/Memory requirement (#34683)

Adds a clarification note that these properties are not strictly enforced at runtime, but are still required nonetheless.

### Issue #34645 

Fixes #34645.

### Reason for this change

[ECS docs](https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task_definition_parameters.html#task_size) was recently updated to state that the CPU/Memory property is not enforced on Windows platforms, but are still required nonetheless.

### Description of changes

Add note to the CPU and memory property of Fargate task definitions.

### Describe any new or updated permissions being added

No permissions added or updated.


### Description of how you validated changes

No tests needed as this is a documentation change.

### 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)

----

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

Author: Abogical

packages/aws-cdk-lib/aws-ecs/lib/fargate/fargate-task-definition.ts

@@ -37,6 +37,9 @@ export interface FargateTaskDefinitionProps extends CommonTaskDefinitionProps {
    *
    * 16384 (16 vCPU) - Available memory values: Between 32768 (32 GB) and 122880 (120 GB) in increments of 8192 (8 GB)
    *
+   * Note: For windows platforms, this field is not enforced at runtime. However, it is still required as it is used to determine
+   * the instance type and size that tasks run on.
+   *
    * @default 256
    */
   readonly cpu?: number;
@@ -59,6 +62,9 @@ export interface FargateTaskDefinitionProps extends CommonTaskDefinitionProps {
    *
    * Between 32768 (32 GB) and 122880 (120 GB) in increments of 8192 (8 GB) - Available cpu values: 16384 (16 vCPU)
    *
+   * Note: For windows platforms, this field is not enforced at runtime. However, it is still required as it is used to determine
+   * the instance type and size that tasks run on.
+   *
    * @default 512
    */
   readonly memoryLimitMiB?: number;