Unlock the repo

cilium/cilium#34178 got merged. Remove the lock
workflow and update CONTRIBUTING.md.

Signed-off-by: Michi Mutsuzaki <[email protected]>

Author: michi-covalent

Diff for: .github/workflows/lock.yaml

@@ -1,19 +1,12 @@
 # Contributing to Cilium CLI
 
-## IMPORTANT Cilium CLI is moving 🚚📦📦📦
-
-We are planning to merge Cilium CLI code into cilium/cilium repository to
-simplify the overall development process after Cilium v1.16.0 gets released.
-See [CFP-25694](https://github.com/cilium/design-cfps/pull/9) for details.
-If you have questions, post a message in
-[#development Cilium Slack channel](https://cilium.slack.com/archives/C2B917YHE).
-
 ## Contribution workflow
 
-Cilium CLI uses GitHub for collaborative development. Please use GitHub issues
-to discuss proposals and use pull requests to suggest changes. For more
-information see the [Cilium Development
-Guide](https://docs.cilium.io/en/latest/contributing/development/).
+Cilium CLI uses GitHub for collaborative development. This repository only hosts
+release artifacts for Cilium CLI. The actual code for Cilium CLI is in
+[Cilium GitHub repository] under [`cilium-cli/` directory]. Please use GitHub
+issues to discuss proposals and use pull requests to suggest changes in
+[Cilium GitHub repository]. For more information see the [Development Guide].
 
 ## Slack
 
@@ -28,3 +21,7 @@ Conduct](https://github.com/cilium/cilium/blob/main/CODE_OF_CONDUCT.md). Only
 by respecting each other can we develop a productive, collaborative community.
 If you would like to report a violation of the code of contact, please contact
 any of the maintainers or our mediator, Beatriz Martinez <[email protected]>.
+
+[`cilium-cli/` directory]: https://github.com/cilium/cilium/tree/main/cilium-cli
+[Cilium GitHub repository]: https://github.com/cilium/cilium
+[Development Guide]: https://docs.cilium.io/en/latest/contributing/development/