Fix references to old name of Toolkit

[tpdownes]

Fix references to old name of the Cluster Toolkit. This change is documentation only and we will not update the version tags in our Terraform and Go code. However, we will create a new tag/release in the GitHub UI after merging.

Submission Checklist

Please take the following actions before submitting this pull request.

• Fork your PR branch from the Toolkit "develop" branch (not main)
• Test all changes with pre-commit in a local branch #
• Confirm that "make tests" passes all tests
• Add or modify unit tests to cover code changes
• Ensure that unit test coverage remains above 80%
• Update all applicable documentation
• Follow Cluster Toolkit Contribution guidelines #