Merge pull request #355 from cloudfoundry/renovate/terragrunt-0.x

Update dependency terragrunt to v0.78.4

Author: jochenehret

.tool-versions

@@ -6,7 +6,7 @@ kubectl 1.32.1
 python 3.13.1
 terraform 1.10.4
 terraform-lsp 0.0.12
-terragrunt 0.72.1
+terragrunt 0.78.4
 vendir 0.43.0
 yq 4.43.1
 ytt 0.44.1