README missing in helm chart distribution

**Is your feature request related to a problem? Please describe.**

the helm chart seems not to include a README

quick check:
artifacthub.io shows READMEs if available:

pulsar: no README
https://artifacthub.io/packages/helm/apache/pulsar

example with included README:
kube prometheus stack
https://artifacthub.io/packages/helm/prometheus-community/kube-prometheus-stack

**Describe the solution you'd like**
ad README to helm chart (file/url)

background: https://helm.sh/docs/topics/charts/#chart-license-readme-and-notes
check with https://helm.sh/docs/helm/helm_show_readme/

**Describe alternatives you've considered**
none

**Additional context**
none


Inspect the Helm chart distribution and consult the Helm chart README documentation linked in the issue. Use `helm show readme` to verify the packaged chart exposes the README, and confirm that Artifact Hub displays it for the Apache Pulsar chart.

Written by the indexing model from the issue text.