Docs: Add new SAR ARN to documentation

[leandrodamascena]

What were you searching in the docs?

When we complete and deploy the issue #5221 we need to change the documentation to include the new SAR ARN.

Is this related to an existing documentation section?

https://docs.powertools.aws.dev/lambda/python/3.7.0/#sar

How can we improve?

We need to add new SAR ARN to documentation

Got a suggestion in mind?

No response

Acknowledgment

• I understand the final update might be different from my proposed suggestion, or refused.