Update example ppvars and README/index doc for correct var usage with dependent mods

[cbruno10]

No description provided.

[Copilot]

Pull Request Overview

This PR updates the examples and documentation to use the correct variable naming convention with the "aws_tags" prefix for dependent modules. The changes improve consistency in documented command-line examples and path references.

• Updated variable names in command-line examples to include the "aws_tags" prefix.
• Modified the file copy command in the README to reference the new module path.
• Revised examples in the documentation for both benchmark and control commands.

Reviewed Changes

Copilot reviewed 2 out of 3 changed files in this pull request and generated no comments.

File	Description
docs/index.md	Updated variable names in examples and remediation sections to include the "aws_tags" prefix.
README.md	Adjusted variable usage in command examples and changed the copy command path to the new module location.

Files not reviewed (1)

• powerpipe.ppvars.example: Language not supported

Comments suppressed due to low confidence (1)

README.md:88

• Verify that the new file path for the powerpipe.ppvars.example is valid in all expected environments. If not, consider providing additional context or fallback instructions in the documentation.

cp .powerpipe/mods/github.com/turbot/steampipe-mod-aws-tags@v1.0.1/powerpipe.ppvars.example powerpipe.ppvars