Make uaa-ci private

The repo has been transferred but still needs some updates to it's docs to target OSS community. Keep it private for now to not cause confusion.

Author: rkoster

org/cloudfoundry.yml

@@ -2372,6 +2372,7 @@ orgs:
         default_branch: main
         has_projects: true
         has_wiki: false
+        private: true
       uaa-cli:
         description: CLI for UAA written in Go
         has_projects: true