chore: Update list item access syntax to use square brackets

[arairyus]

Description

Fixed TFLint warnings related to the terraform_deprecated_index rule. Updated the list index access syntax from using the splat operator .* to square brackets [*] to adhere to newer Terraform standards and resolve the TFLint warnings.

Motivation and Context

When calling this module directly via the terraform.source in terragrunt.hcl, TFLint warnings are triggered. Disabling the rule for each directory using .tflint.hcl is cumbersome.

Breaking Changes

None

How Has This Been Tested?

• [x] I have updated at least one of the examples/* to demonstrate and validate my change(s)
• [x] I have tested and validated these changes using one or more of the provided examples/* projects
• [x] I have executed pre-commit run -a on my pull request

[github-actions[bot]]

This PR has been automatically marked as stale because it has been open 30 days with no activity. Remove stale label or comment or this PR will be closed in 10 days

[github-actions[bot]]

This PR was automatically closed because of stale in 10 days

[github-actions[bot]]

I'm going to lock this pull request because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues. If you have found a problem that seems related to this change, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further.