Chart.yaml - broken helm chart icon links(404: Not Found)

[arukiidou]

Describe the bug
helm chart icon links are broken(404: Not Found)

To Reproduce
Steps to reproduce the behavior:

1. see https://raw.githubusercontent.com/nginxinc/nginx-gateway-fabric/tree/main/deploy/helm-chart/chart-icon.png
2. ❌404: Not Found

Expected behavior

1. see https://raw.githubusercontent.com/nginxinc/nginx-gateway-fabric/main/deploy/helm-chart/chart-icon.png
2. ✅display icon

Your environment
any

Additional context
none.