chore(charts): sync nebari-nebi-pack v0.1.2 from nebari-dev/nebi-pack

[dcmcand]

Automated chart sync

Field	Value
Chart	nebari-nebi-pack
Version	0.1.2
Source repository	nebari-dev/nebi-pack
Source ref	main
Triggered by	push at fc9b512527d009baac8dba9c48ee98f9e44fad14

---

Merging this PR will trigger the
Release Helm Charts
workflow, which will:

1. Run helm package on the updated chart.
2. Merge the new package into index.yaml (preserving existing chart timestamps).
3. Publish the chart archive and updated index to the
   Nebari Helm Repository.

Note: This PR was opened automatically. Review the chart diff before merging.

To refresh it:

• New upstream release: push the release in the source repository, and this
  branch is force-updated automatically by the upstream sync workflow.
• Branch fell behind main (e.g., Chart.yaml conflict because a sibling
  sync PR merged first): comment /sync-rebase on this PR. A maintainer-gated
  workflow rebases the branch onto current main, resolving the
  version / appVersion clash automatically.