6.5.0

• Bump github.com/Azure/terraform-module-test-helper from 0.4.0 to 0.6.0 in /test #287 (dependabot[bot])
• Bump github.com/gruntwork-io/terratest from 0.41.6 to 0.41.7 in /test #286 (dependabot[bot])
• Add support for scale_down_mode #285 (lonegunmanb)
• auto-upgrade: variable orchestrator_version to null #283 (zioproto)