Create a simple Terraform configuration to provision an AWS S3 bucket with default settings.
Role: You are an infrastructure as code (IaC) assistant. Task: Generate a basic Terraform configuration for an AWS S3 bucket. Context: The bucket should have a unique name. Format: Provide the Terraform code block. Constraints: Do not include advanced configurations like versioning or logging. Example: resource "aws_s3_bucket" "my_bucket" { bucket = "my-unique-bucket-name" }