Bump alpine/terragrunt from 1.5.7 to 1.6.0 (#4720)

Bumps alpine/terragrunt from 1.5.7 to 1.6.0.

---
updated-dependencies:
- dependency-name: alpine/terragrunt
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Zack Koppert <zkoppert@github.com>

Dockerfile

@@ -8,7 +8,7 @@
 # Get dependency images as build stages #
 #########################################
 FROM tenable/terrascan:1.18.3 as terrascan
-FROM alpine/terragrunt:1.5.7 as terragrunt
+FROM alpine/terragrunt:1.6.0 as terragrunt
 FROM ghcr.io/assignuser/chktex-alpine:v0.2.0 as chktex
 FROM dotenvlinter/dotenv-linter:3.3.0 as dotenv-linter
 FROM ghcr.io/awkbar-devops/clang-format:v1.0.2 as clang-format