Bump AWS Terraform module version to at least 6.40.0

### What would you like to be added?

I am currently writing S3 Files storage modules for the Fundamentals -> Storage section of the workshop. When testing this workshop in the local development environment with `make ide`, and then attempting to make Terraform calls for `aws-s3files-file-system` fail. S3 Files was added in the AWS Terraform module in version [6.40.0](https://github.com/hashicorp/terraform-provider-aws/issues/47324) but the AWS Terraform module in the IDE environment is 6.31.0

### Why is this needed?

Bump AWS Terraform module to 6.40.0 or higher to support S3 Files so the S3 Files storage module can be added.

Start by locating the AWS Terraform module version used by the IDE environment invoked with `make ide`; confirm where version 6.31.0 is configured. Update it to 6.40.0 or higher, then test Terraform calls for `aws-s3files-file-system` in the local development environment and confirm they succeed.

Written by the indexing model from the issue text.