Bump containerd-shim from 0.7.4 to 0.8.0

Bumps [containerd-shim](https://github.com/containerd/rust-extensions) from 0.7.4 to 0.8.0.
- [Release notes](https://github.com/containerd/rust-extensions/releases)
- [Commits](containerd/rust-extensions@shim-v0.7.4...shim-v0.8.0)

---
updated-dependencies:
- dependency-name: containerd-shim
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]