deps: Bump terragrunt version to 0.88.1

[elastic-observability-automation]

deps: Bump terragrunt version

deps(terragrunt): Bump terragrunt version to 0.88.1

1 file(s) updated with "0.88.1\n": * tests/terragrunt/version/.terragrunt-version

0.88.1

Release published on the 2025-09-29 18:46:42 +0000 UTC at the url https://github.com/gruntwork-io/terragrunt/releases/tag/v0.88.1

## What's Changed
* feat: Use better parsing for `--auth-provider-cmd` by @yhakbar in https://github.com/gruntwork-io/terragrunt/pull/4881
* fix: Fixing race condition for `TestTerragruntExcludesFile` by @yhakbar in https://github.com/gruntwork-io/terragrunt/pull/4809
* fix: Fixing report flags by @yhakbar in https://github.com/gruntwork-io/terragrunt/pull/4899
* fix: Fixing `.tf` vs `.tofu` extension parity by @yhakbar in https://github.com/gruntwork-io/terragrunt/pull/4794
* chore: Add data.tf to iam directory in refactoring guide by @vit100-trader in https://github.com/gruntwork-io/terragrunt/pull/4888
* chore: Refactoring GitHub client into dedicated package by @yhakbar in https://github.com/gruntwork-io/terragrunt/pull/4879
* build(deps): bump the js-dependencies group across 1 directory with 7 updates by @dependabot[bot] in https://github.com/gruntwork-io/terragrunt/pull/4878
* docs: Update 01-quick-start.mdx by @vit100 in https://github.com/gruntwork-io/terragrunt/pull/4883
* docs: CI for Terralith to Terragrunt Guide by @yhakbar in https://github.com/gruntwork-io/terragrunt/pull/4811
* docs: Update OG images by @karlcarstensen in https://github.com/gruntwork-io/terragrunt/pull/4889

## New Contributors
* @vit100 made their first contribution in https://github.com/gruntwork-io/terragrunt/pull/4883
* @vit100-trader made their first contribution in https://github.com/gruntwork-io/terragrunt/pull/4888

**Full Changelog**: https://github.com/gruntwork-io/terragrunt/compare/v0.88.0...v0.88.1

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