patch(deps): update dependency hashicorp/terraform to v1.6.4

[renovate]

This PR contains the following updates:

Package	Update	Change
hashicorp/terraform	patch	1.6.3 -> 1.6.4

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Release Notes

hashicorp/terraform (hashicorp/terraform)

v1.6.4

Compare Source

1.6.4 (November 15, 2023)

ENHANCEMENTS:

• backend/s3: Add the parameter endpoints.sso to allow overriding the AWS SSO API endpoint. (#​34195)

BUG FIXES:

• terraform test: Fix bug preventing passing sensitive output values from previous run blocks as inputs to future run blocks. (#​34190)
• backend/s3: Add https_proxy and no_proxy parameters to allow fully specifying proxy configuration (#​34243)

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