community/containerd: upgrade to 1.4.0

Welcome to the v1.4.0 release of containerd!

The fifth major release of containerd includes a mix of new features and expanded support, such as support for CGroups v2, expanded SELinux support, support for Windows on Kubernetes through CRI, and support for snapshotters based on shared remote storage. All significant bug and stability fixes included in this release are also available on supported prior releases. Like previous major releases, what is not included in this release is also important. There are only two small additions to the API with no backwards incompatible changes, allowing client and daemon upgrades to be done independently without disruption. The incredible increase in usage of containerd over the last year has shown the value of our core principles to easily expand support for different use cases while driving toward ever increasing stability.

For more details, see https://github.com/containerd/containerd/releases/tag/v1.4.0