Change /charts to ecosystem

[xmulligan]

Repository URL

https://github.com/cilium/charts

Current Scope

Sub-project

Proposed Scope

Ecosystem

Motivation for Request

/charts is something that people consume rather than really contribute to

Code of Conduct

• I agree to follow Cilium's Code of Conduct

To be filled by a Cilium committer

• Approved change of scope is reflected in REPOSITORIES.md