deps: Bump terragrunt version to 0.93.8

[elastic-observability-automation]

deps: Bump terragrunt version

deps(terragrunt): Bump terragrunt version to 0.93.8

1 file(s) updated with "0.93.8\n": * tests/terragrunt/version/.terragrunt-version

v0.93.8

## ⚙️ Process Improvements

### Terragrunt static executables

* Release pipeline now publishes statically linked executables

## What's Changed
* chore: Re-enable units reading with filter test by @yhakbar in https://github.com/gruntwork-io/terragrunt/pull/5077
* chore: static executables building by @denis256 in https://github.com/gruntwork-io/terragrunt/pull/5093
* docs: installation steps update by @denis256 in https://github.com/gruntwork-io/terragrunt/pull/5091

**Full Changelog**: https://github.com/gruntwork-io/terragrunt/compare/v0.93.7...v0.93.8

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