Bump gruntwork-io/terragrunt from 0.51.8 to 0.51.9

Bumps [gruntwork-io/terragrunt](https://github.com/gruntwork-io/terragrunt) from 0.51.8 to 0.51.9.
- [Release notes](https://github.com/gruntwork-io/terragrunt/releases)
- [Commits](gruntwork-io/terragrunt@v0.51.8...v0.51.9)

---
updated-dependencies:
- dependency-name: gruntwork-io/terragrunt
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/dependabot_hack.yml

@@ -22,4 +22,4 @@ jobs:
     steps:
       # Keep these sorted alphabetically by <user>/<repo>, separated by an empty line
 
-      - uses: gruntwork-io/[email protected].8
+      - uses: gruntwork-io/[email protected].9