Update tutorial.md

[jsindt]

Fixing minor errors to instructions for setting bucket policies.

EIDF Documentation Pull Request

Description

Please include a summary of the change and any issues being addressed.

Please also include relevant motivation and context.

List any dependencies that are required for this change.

Fixes # (issue)

Type of change

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• Incorrect Documentation
• Incomplete Documentation
• Missing Documentation
• Formatting
• New Documentation

What has to be reviewed

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Checklist

• Documentation follows the project style guidelines
• Ensure Contact details contain Service Emails and Numbers
• Self-review of documentation using mkdocs on local system
• Spellcheck has been performed
• Pre-commit has been run and passed