Fix docs

### Bug Description

The action for generating terraform docs is failing due git.

### To Reproduce

See https://github.com/canonical/terraform-modules/actions/runs/7974254296/job/21769737587

### Environment

n/a

### Relevant log output

```shell
n/a
```

### Additional context

_No response_

Start with the referenced GitHub Actions run and inspect the failure in the action that generates Terraform documentation. Trace the git-related error to the workflow or action configuration; done means the documentation action completes successfully.

Written by the indexing model from the issue text.