README.md: Lima is now a CNCF Sandbox project

Signed-off-by: Akihiro Suda <[email protected]>

Author: AkihiroSuda

README.md

@@ -57,6 +57,9 @@ GUI:
   - New account: https://slack.rancher.io/
   - Login: https://rancher-users.slack.com/
 
+### Code of Conduct
+Lima follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/master/code-of-conduct.md).
+
 ## Examples
 
 ### uname
@@ -485,3 +488,10 @@ LIMA_HOME="$HOME/.local/share/rancher-desktop/lima" "$(ls -d /tmp/.mount_ranche*
   - `/var/log/cloud-init-output.log` (inside the guest)
   - `/var/log/cloud-init.log` (inside the guest)
 - Make sure that you aren't mixing up tabs and spaces in the YAML.
+
+- - -
+**We are a [Cloud Native Computing Foundation](https://cncf.io/) sandbox project.**
+
+<img src="https://www.cncf.io/wp-content/uploads/2022/07/cncf-color-bg.svg" width=300 />
+
+The Linux Foundation® (TLF) has registered trademarks and uses trademarks. For a list of TLF trademarks, see [Trademark Usage](https://www.linuxfoundation.org/trademark-usage/).