Set fetch depth to 0 to pull history to fix hugo lastmod

[nginx-jack]

Proposed changes

We use Hugo Lastmod to generate last-modified metadata in our rendered pages, as well as lastmod values across site maps.
By default, the github checkout action only fetches at a depth of 1, which is faster and fine for most cases. Hugo uses this to figure out the last modified date, so all metadata was being set to the current date, and therefore incorrect.
For our largest repo, this add 4 seconds to our checkout time, which we can afford 😅 .

Add enableGitInfo=true to hugo's config.toml.

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• I have updated any relevant documentation (README.md and CHANGELOG.md)