Merge pull request kubernetes-sigs#688 from bridgetkromhout/kubernetes-footer

List the SIG and K8s on the website footer.

Author: k8s-ci-robot

website/docusaurus.config.ts

@@ -178,7 +178,7 @@ const config: Config = {
           ],
         },
       ],
-      copyright: "kro.run",
+      copyright: "kro is a subproject of Kubernetes SIG Cloud Provider. Kubernetes is a CNCF graduated project."
     },
     /* announcementBar: {
       id: `beta announcement`,