Merge pull request #286 from cloudfoundry/renovate/gruntwork-io-terragrunt-0.x

chore(deps): update dependency gruntwork-io/terragrunt to v0.54.18

Author: OliverMautschke

.tool-versions

@@ -6,7 +6,7 @@ kubectl 1.29.0
 python 3.12.1
 terraform 1.6.5
 terraform-lsp 0.0.12
-terragrunt 0.54.17
+terragrunt 0.54.18
 vendir 0.38.0
 yq 4.40.5
 ytt 0.44.1