fix schema 1.12 to correctly allow the import block to use for_each

[anubhav-goel]

Bumped terraform-schema
Related terrraform-schema PR: hashicorp/terraform-schema#484

PCI review checklist

• I have documented a clear reason for, and description of, the change I am making.
• If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.
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