Bump rust-vmm-ci from ae7db2d to f67ef4c

Bumps [rust-vmm-ci](https://github.com/rust-vmm/rust-vmm-ci) from `ae7db2d` to `f67ef4c`.
- [Release notes](https://github.com/rust-vmm/rust-vmm-ci/releases)
- [Commits](rust-vmm/rust-vmm-ci@ae7db2d...f67ef4c)

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

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Author: dependabot[bot]