Issue #392 - Use case rationalisations

[luigidifraiawork]

Amazon Bedrock AgentCore Samples Pull Request

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Issue number: #392

Concise description of the PR

Make a few rationalisations to the auto insurance use case material.

User experience

Several cleanup commands were using non-existing options. They now work as expected.
A few instructions were missing within the use case's markdown material. They were added.

Checklist

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• I have reviewed the contributing guidelines
• Add your name to CONTRIBUTORS.md
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Are you uploading a dataset?
• Have you documented Introduction, Architecture Diagram, Prerequisites, Usage, Sample Prompts, and Clean Up steps in your example README?
• I agree to resolve any issues created for this example in the future.
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented

Acknowledgment

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