Issue accessing S3 bucket bedrock-data-exploration-assets-us-east-1

Hi all,

We are aware that S3 bucket `bedrock-data-exploration-assets-us-east-1` (where the one-click CloudFormation launch stack for this sample is hosted) is no longer publicly accessible, and are working on possible resolutions.

In the interim, users should be able to download the [bootstrap.cfn.yaml template](https://github.com/aws-samples/query-structured-data-with-amazon-bedrock/blob/main/bootstrap.cfn.yaml) from this repository locally, and drag/drop it into the [AWS CloudFormation Console create stack flow](https://console.aws.amazon.com/cloudformation/home?#/stacks/create) for easy sample deployment.