Bump rust-vmm-ci from 7f22582 to 68d4dbf

Bumps [rust-vmm-ci](https://github.com/rust-vmm/rust-vmm-ci) from `7f22582` to `68d4dbf`.
- [Release notes](https://github.com/rust-vmm/rust-vmm-ci/releases)
- [Commits](rust-vmm/rust-vmm-ci@7f22582...68d4dbf)

---
updated-dependencies:
- dependency-name: rust-vmm-ci
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]