another docs update (#856)

* another docs update

- remove duplicate content from README.md
- mention CNCF announcement in README and index.md
- mention Kyverno adoption
- drop broken ko deps link
- mention SBOMs and multi-platform in intro section

* rename k8s slack channel

docs/index.md

@@ -2,6 +2,8 @@
 ko_meta: true
 ---
 
+> 🎉 Google has applied for `ko` to join the Cloud Native Computing Foundation as a Sandbox project! Learn more [here](https://opensource.googleblog.com/2022/10/ko-applies-to-become-a-cncf-sandbox-project.html)!
+
 # Introduction
 
 `ko` makes building Go container images easy, fast, and secure by default.
@@ -15,7 +17,7 @@ It's ideal for use cases where your image contains a single Go application witho
 `ko` builds images by executing `go build` on your local machine, and as such doesn't require `docker` to be installed.
 This can make it a good fit for lightweight CI/CD use cases.
 
-`ko` also includes support for simple YAML templating which makes it a powerful tool for [Kubernetes applications](./features/k8s).
+`ko` makes [multi-platform builds](https://ko.build/features/multi-platform/) easy, produces [SBOMs](https://ko.build/features/sboms/) by default, and includes support for simple YAML templating which makes it a powerful tool for [Kubernetes applications](https://ko.build/features/k8s/).
 
 ---
 
@@ -28,8 +30,9 @@ This can make it a good fit for lightweight CI/CD use cases.
 - [Knative](https://knative.dev)
 - [Tekton](https://tekton.dev)
 - [Karpenter](https://karpenter.sh)
+- [Kyverno](https://kyverno.io)
 - [Sigstore](https://sigstore.dev)
 - [Shipwright](https://shipwright.io)
 
-[_Add your project here!_](https://github.com/imjasonh/ko.build/edit/main/docs/index.md)
+[_Add your project here!_](https://github.com/ko-build/ko/edit/main/docs/index.md)
 

docs/install.md

@@ -53,6 +53,6 @@ You can use the [setup-ko](https://github.com/imjasonh/setup-ko) action to insta
 
 ```plaintext
 steps:
-- uses: imjasonh/setup-ko@v0.4
+- uses: imjasonh/setup-ko@v0.6
 ```