README: Update status
We're at rc2 now.
[![Build Status](https://img.shields.io/travis/kubernetes-incubator/cri-o.svg?maxAge=2592000&style=flat-square)](https://travis-ci.org/kubernetes-incubator/cri-o)
[![Go Report Card](https://goreportcard.com/badge/github.com/kubernetes-incubator/cri-o?style=flat-square)](https://goreportcard.com/report/github.com/kubernetes-incubator/cri-o)
-### Status: Release Candidate 1
+### Status: Release Candidate 2
## What is the scope of this project?
