Update Indirect Dependencies

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/hashicorp/terraform-plugin-sdk	require	minor	v1.5.0 -> v1.6.0
github.com/nukosuke/go-zendesk	require	patch	v0.7.1 -> v0.7.2

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Release Notes

hashicorp/terraform-plugin-sdk

### [`v1.6.0`](https://togithub.com/hashicorp/terraform-plugin-sdk/compare/v1.5.0...v1.6.0) [Compare Source](https://togithub.com/hashicorp/terraform-plugin-sdk/compare/v1.5.0...v1.6.0)

nukosuke/go-zendesk

### [`v0.7.2`](https://togithub.com/nukosuke/go-zendesk/releases/v0.7.2) [Compare Source](https://togithub.com/nukosuke/go-zendesk/compare/v0.7.1...v0.7.2) ##### New Support: - Support **Ticket Comment** API [#​158](https://togithub.com/nukosuke/go-zendesk/issues/158) / [@​codykaup](https://togithub.com/codykaup)

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