chore(ci): Update helm-docs from 1.12.0 to 1.13.0

[hairmare]

Description

Housekeeping update: https://github.com/norwoodj/helm-docs/commit/6cdd5ff340b10810d47011b7486c869a8e05df47

This also adds git-cliff based changelog generation which we don't currently use.

Issues

Checklist

• [x] This PR contains a description of the changes I'm making
• [x] I updated the version in Chart.yaml
• [x] I updated the changelog with an artifacthub.io/changes annotation in Chart.yaml, check the example in the documentation.
• [x] I updated applicable README.md files using pre-commit run
• [x] I documented any high-level concepts I'm introducing in docs/
• [ ] CI is currently green and this is ready for review
• [x] I am ready to test changes after they are applied and released