docs: adding missing info from the changelog and improve vars

[hugoalmeida264]

Description

adding missing info from the changelog and improve vars

Checklists:

PR Owners Checklist:

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Have you checked there aren't open Pull Requests of upstream or parallel code that will cause conflicts?
• Have you updated the CHANGELOG.md?
• Have you updated the README.md(s)?
• OWNER: Does your submission pass?
  • Pre-commit (attach logs/print screen to this PR)
  • Checkov/terrascan (attach logs/print screen to this PR)
  • Terraform resources examples build/destroy successfully with Terraform 0.14.11 minimum?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully run tests with your changes locally?
• First PR? Have you deleted ## How to use this template... from the root .README.md?

PR Reviewers Checklists?

• Are all your comments/changes resolved?
• Are you happy with the OWNER checklists and additional information provided?
• Does your review tests pass?
  • Terraform resources examples build/destroy successfully with Terraform 0.14.11 minimum?