Update Golang module github.com/hashicorp/hcl/v2

[updateclibot]

Update Golang module github.com/hashicorp/hcl/v2

Run Go mod tidy

ran shell command "go mod tidy"

Update github.com/hashicorp/hcl/v2 Golang module version

go.mod updated Module path "github.com/hashicorp/hcl/v2" version from "v2.17.0" to "v2.18.0"

v2.18.0

Changelog retrieved from:
	https://github.com/hashicorp/hcl/releases/tag/v2.18.0
### Enhancements

* HCL now uses the tables from Unicode 15 when performing string normalization and character segmentation. HCL was previously using the Unicode 13 tables.

    For calling applications where consistent Unicode support is important, consider also upgrading to Go 1.21 at the same time as adopting HCL v2.18.0 so that the standard library unicode tables (used for case folding, etc) will also be from Unicode 15.

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