Bump dependency terraform from v1.16.5 to v1.16.6

[dghubble-renovate]

This PR contains the following updates:

Package	Type	Update	Change
terraform	uses-with	patch	v1.16.5 → v1.16.6

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Release Notes

hashicorp/terraform (terraform)

v1.16.6

Compare Source

1.16.6 (October 14, 2026)

BUG FIXES:

• cloud: terraform init can now find workspaces selected by key/value tags whose keys contain uppercase letters. (#​39306)

• test: Allow module under test to use deprecated outputs. (#​39207)

NOTES:

• Prevent a HTTP/2 resource exhaustion via CVE-2026-78669. Exploitation would require a compromised (untrusted) provider/module registry. Such a threat is considered to be outside the perimeter of Terraform core security guarantees. (#​39375)

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