build(deps): bump libsystemd from 0.7.0 to 0.7.2

Bumps [libsystemd](https://github.com/lucab/libsystemd-rs) from 0.7.0 to 0.7.2.
- [Release notes](https://github.com/lucab/libsystemd-rs/releases)
- [Commits](lucab/libsystemd-rs@v0.7.0...v0.7.2)

---
updated-dependencies:
- dependency-name: libsystemd
  dependency-version: 0.7.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]