Bump rust-vmm-ci from c2f8c93 to 3f9869f

Bumps [rust-vmm-ci](https://github.com/rust-vmm/rust-vmm-ci) from `c2f8c93` to `3f9869f`.
- [Release notes](https://github.com/rust-vmm/rust-vmm-ci/releases)
- [Commits](rust-vmm/rust-vmm-ci@c2f8c93...3f9869f)

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

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

Author: dependabot[bot]