collie kit apply renders invalid inputs block

[JohannesRudolph]

Describe the bug A clear and concise description of what the bug is and whom it impacts.

To Reproduce

1. Create a kit module without an explicit template for terragrunt.hcl
2. Run collie kit apply.
3. should now have a terragrunt.hcl like

inputs = {
  # todo: set input variables
  kit/azure/buildingblocks/automation/README.md updated successfully
}

collie info output:

collie 0.24.0-2-g3f740f9

Runtime:
deno 1.40.2 aarch64-apple-darwin

Installed dependencies:
x aws not installed
✔ az 2.53.1
✔ gcloud 452.0.1
✔ git 2.42.0
x terraform v1.6.4-dev unsupported version
✔ terragrunt v0.55.0
✔ terraform-docs v0.17.0
✔ npm 9.8.1