Bump zenoh-c from 9175558 to d9d8d15

Bumps [zenoh-c](https://github.com/eclipse-zenoh/zenoh-c) from `9175558` to `d9d8d15`.
- [Release notes](https://github.com/eclipse-zenoh/zenoh-c/releases)
- [Commits](eclipse-zenoh/zenoh-c@9175558...d9d8d15)

---
updated-dependencies:
- dependency-name: zenoh-c
  dependency-type: direct:production
...

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

Author: dependabot[bot]