IAM policy instruction Bug fix

[lhgomes]

Description

IAM policy instruction is asking for s3:HeadBucket permission that doesn't exists. It need to be changed to s3:ListBucket

Motivation

Help others to setup this task correctly

Testing

No test is required

Checklist

• I have read the README document
• I have read the CONTRIBUTING document
• My code follows the code style of this project
• I have added tests to cover my changes
• A short description of the change has been added to the changelog using the script npm run newChange

License

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[hayemaxi]

Thanks for your contribution! I believe the current wording is accurate as it is specifically referring to an API operation and not an IAM permission (s3:HeadBucket is an operation). Instead, maybe it is useful to link to the page to see the required permissions to perform this action.

Suggested change

"helpMarkDown": "Please refer to [Working with Amazon S3 Buckets](https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingBucket.html) for more information on working with Amazon S3.\n\nMore information on this task can be found in the [task reference](https://docs.aws.amazon.com/vsts/latest/userguide/s3-upload.html).\n\n####Task Permissions\nThis task requires permissions to call the following AWS service APIs (depending on selected task options, not all APIs may be used):\n* s3:CreateBucket\n* s3:ListBucket\n\nContent uploads are performed using S3's PutObject API and/or the multi-part upload APIs. The specific APIs used depend on the size of the individual files being uploaded.",

"helpMarkDown": "Please refer to [Working with Amazon S3 Buckets](https://docs.aws.amazon.com/AmazonS3/latest/dev/UsingBucket.html) for more information on working with Amazon S3.\n\nMore information on this task can be found in the [task reference](https://docs.aws.amazon.com/vsts/latest/userguide/s3-upload.html).\n\n####Task Permissions\nThis task requires permissions to call the following AWS service APIs (depending on selected task options, not all APIs may be used):\n* s3:CreateBucket\n* [s3:HeadBucket](https://docs.aws.amazon.com/AmazonS3/latest/API/API_HeadBucket.html)\n\nContent uploads are performed using S3's PutObject API and/or the multi-part upload APIs. The specific APIs used depend on the size of the individual files being uploaded.",