fix(terragrunt_validate): Only run terragrunt_validate in valid direc…

…tories (antonbabenko#191)

The command fails if there is no terragrunt.hcl file in the directory.

.pre-commit-hooks.yaml

@@ -82,7 +82,7 @@
  description: Validates all Terragrunt configuration files.
  entry: terragrunt_validate.sh
  language: script
- files: (\.hcl)$
+ files: (/terragrunt\.hcl)$
  exclude: \.terraform\/.*$
 
 - id: terraform_tfsec