Ignore Terraform lock files (#5610)
Ignore Terraform lock files (#5610)

* Ignore Terraform lock files

As described in [docs](https://www.terraform.io/docs/language/dependency-lock.html), Terraform has a `.terraform.lock.hcl` file that functions the same way as NPM and other similar lock files.  This PR hides it by default.

This addresses https://github.com/github/feedback/discussions/5897

* Tighten regex

Co-authored-by: John Gardner <e36d49b36f1c453256531efcafb5a1ecb0806815@gmail.com>

Co-authored-by: Colin Seymour <342564bc1ab1e55103f85104b5e013adfdf828cb@github.com>
Co-authored-by: John Gardner <e36d49b36f1c453256531efcafb5a1ecb0806815@gmail.com>
github/linguist,github/linguist,github/linguist,erkyrath/linguist,github/linguist,erkyrath/linguist,erkyrath/linguist,erkyrath/linguist