update containerd binary to v1.6.28

Update the containerd binary that's used in CI

- full diff: https://github.com/containerd/containerd/compare/v1.6.27...v1.6.28
- release notes: https://github.com/containerd/containerd/releases/tag/v1.6.28

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -191,7 +191,7 @@ RUN git init . && git remote add origin "https://github.com/containerd/container
 # When updating the binary version you may also need to update the vendor
 # version to pick up bug fixes or new APIs, however, usually the Go packages
 # are built from a commit from the master branch.
-ARG CONTAINERD_VERSION=v1.6.27
+ARG CONTAINERD_VERSION=v1.6.28
 RUN git fetch -q --depth 1 origin "${CONTAINERD_VERSION}" +refs/tags/*:refs/tags/* && git checkout -q FETCH_HEAD
 
 FROM base AS containerd-build

Dockerfile.windows

@@ -168,7 +168,7 @@ SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPref
 ARG GO_VERSION=1.20.13
 ARG GOTESTSUM_VERSION=v1.8.2
 ARG GOWINRES_VERSION=v0.3.0
-ARG CONTAINERD_VERSION=v1.6.27
+ARG CONTAINERD_VERSION=v1.6.28
 
 # Environment variable notes:
 #  - GO_VERSION must be consistent with 'Dockerfile' used by Linux.