apigw-lambda-bedrock-nova-terraform: Small improvements (terraform fmt and Fix README)

[kakakakakku]

Issue #, if available:
N/A

Description of changes:
Hi😀 Thanks for the useful patterns!

I made some small improvements:

• Ran terraform fmt
• Fixed markdown display issues

Check

terraform apply completed successfully and works good.

$ curl -X POST \
-H "Content-Type: application/json" \
-d '{"prompt": "What are the key benefits of using AWS services?"}' \
https://1pstk8hkvg.execute-api.us-east-1.amazonaws.com/dev/generate_content
{"generated-text": "Amazon Web Services (AWS) offers a wide range of cloud computing services that provide numerous benefits. Here are some of the key benefits:\n\n1. **Scalability**: AWS allows you to easily scale your computing resources up or down based on your needs. This means you can quickly increase your resources when demand increases and reduce them when demand decreases.\n\n2. **Cost-Effectiveness**: AWS operates on a pay-as-you-go model, which means you only pay for the services you use. This can be more cost-effective than maintaining a data center.\n\n3. **Global Infrastructure**: AWS has a vast global infrastructure with data centers around the world. This allows you to deploy your applications and services globally in a matter of seconds.\n\n4. **Security**: AWS provides robust security features to protect your data and applications. This includes physical security of AWS facilities, network security, and security services to protect your data.\n\n5. **Innovation**: AWS constantly innovates and adds new services to its platform. This allows you to take advantage of the latest technologies as soon as they become available.\n\n6. **Reliability**: AWS is known for its high reliability. It offers multiple redundancy and backup options to ensure your applications and data are always available.\n\n7. **Flexibility**: AWS provides a wide range of services that can be used individually or together. This gives you the flexibility to choose the services that best fit your needs.\n\n8. **Managed Services**: AWS offers many managed services, which means AWS takes care of the administration and management of the service for you. This can save you time and resources.\n\n9. **Developer Tools**: AWS provides a wide range of developer tools that can help you build, test, and deploy your applications more efficiently.\n\n10. **Ecosystem**: AWS has a large and active community of users and developers. This means you can find a lot of resources, tutorials, and third-party tools to help you use AWS services."}

Thank you😀

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