Update registry1.dso.mil/ironbank/hashicorp/terraform Docker tag to v1.7.1

This MR contains the following updates:

Package	Type	Update	Change
registry1.dso.mil/ironbank/hashicorp/terraform	ironbank-base	minor	1.6.6 -> 1.7.1
registry1.dso.mil/ironbank/hashicorp/terraform	final	minor	1.6.6 -> 1.7.1

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