install: mention shimv2 for the manual installation instruction
mentioned shimv2 in the configuration part of manual installation
reference the link of shim v2 api and the k8s containerd howto
@@ -49,7 +49,9 @@ Manual installation instructions are available for [these distributions](#suppor
1. Add the Kata Containers repository to your distro package manager, and import the packages signing key.
2. Install the Kata Containers packages.
3. Install a supported container manager.
-4. Configure the container manager to use `kata-runtime` as the default OCI runtime.
+4. Configure the container manager to use `kata-runtime` as the default OCI runtime. Or, for Kata Containers 1.5.0 or above, configure the
+ `io.containerd.kata.v2` to be the runtime shim (see [containerd runtime v2 (shim API)](https://github.com/containerd/containerd/tree/master/runtime/v2)
+ and [How to use Kata Containers and CRI (containerd plugin) with Kubernetes](https://github.com/kata-containers/documentation/blob/master/how-to/how-to-use-k8s-with-cri-containerd-and-kata.md)).
> **Notes on upgrading**:
> - If you are installing Kata Containers on a system that already has Clear Containers or `runv` installed,
