docs: fix helm-kubernetes-quickstart bundle

With the refactoring of the webpage static files location, new
`helm-kubernetes-quickstart` bundle became corrupt and previous,
non-working bundle was deployed.

This change replaces currently deployed bundle, which is causing the
following error with `opa eval -b helm-kubernetes-quickstart 'data'`

```
loading error: bundle helm-kubernetes-quickstart: bundle load failed
on manifest decode: invalid character '\\x00' looking for beginning
of value
```

This change also fixes the failing e2e pipeline in `opa/kube-mgmt` helm
chart, which depends on the location (and source) of this bundle.

Author: nejec