build(deps): bump the rust-vmm group across 2 directories with 1 update

Bumps the rust-vmm group with 1 update in the / directory: [vmm-sys-util](https://github.com/rust-vmm/vmm-sys-util).
Bumps the rust-vmm group with 1 update in the /staging directory: [vmm-sys-util](https://github.com/rust-vmm/vmm-sys-util).


Updates `vmm-sys-util` from 0.14.0 to 0.15.0
- [Release notes](https://github.com/rust-vmm/vmm-sys-util/releases)
- [Changelog](https://github.com/rust-vmm/vmm-sys-util/blob/main/CHANGELOG.md)
- [Commits](rust-vmm/vmm-sys-util@v0.14.0...v0.15.0)

Updates `vmm-sys-util` from 0.14.0 to 0.15.0
- [Release notes](https://github.com/rust-vmm/vmm-sys-util/releases)
- [Changelog](https://github.com/rust-vmm/vmm-sys-util/blob/main/CHANGELOG.md)
- [Commits](rust-vmm/vmm-sys-util@v0.14.0...v0.15.0)

---
updated-dependencies:
- dependency-name: vmm-sys-util
  dependency-version: 0.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: rust-vmm
- dependency-name: vmm-sys-util
  dependency-version: 0.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: rust-vmm
...

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

Author: dependabot[bot]