Fix DB parameter group settings for Aurora

[JavaScriptBach]

What does this PR do?

Fix docs to specify the correct value of the DB parameter group settings for Aurora.

Motivation

Several of these fields should be "1" instead of "ON" according to AWS documentation. Setting them to "ON" gets them coerced to "1", resulting in never-ending dirty plans if the customer is using Terraform.

Additional Notes

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Reviewer checklist

• [ ] Review the changed files.
• [ ] Review the URLs listed in the Preview section.
• [ ] Check images for PII
• [ ] Review any mentions of "Contact Datadog support" for internal support documentation.