docs(misconf): Add more info on how to use arbitrary JSON/YAML scan feat

[simar7]

Description

Add more info on how to use arbitrary JSON/YAML scan feat

Related issues

• Close https://github.com/aquasecurity/trivy/issues/7457

Checklist

• [x] I've read the guidelines for contributing to this repository.
• [x] I've followed the conventions in the PR title.
• [ ] I've added tests that prove my fix is effective or that my feature works.
• [x] I've updated the documentation with the relevant information (if needed).
• [ ] I've added usage information (if the PR introduces new options)
• [ ] I've included a "before" and "after" example to the description (if the PR is a user interface change).