Update dependency gruntwork-io/terragrunt to v0.42.8

This MR contains the following updates:

Package	Type	Update	Change
gruntwork-io/terragrunt	ironbank-github	patch	v0.42.7 -> v0.42.8
gruntwork-io/terragrunt		patch	v0.42.7 -> v0.42.8

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Release Notes

gruntwork-io/terragrunt

v0.42.8

Compare Source

Description

Updated golang.org/x/crypto dependency to fix CVE-2020-9283.

Related links

• https://github.com/gruntwork-io/terragrunt/pull/2412

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