Bump dropshot from 0.16.0 to 0.17.1 (#391)

Bumps [dropshot](https://github.com/oxidecomputer/dropshot) from 0.16.0 to 0.17.1.
- [Changelog](https://github.com/oxidecomputer/dropshot/blob/main/CHANGELOG.adoc)
- [Commits](oxidecomputer/dropshot@v0.16.0...v0.17.1)

---
updated-dependencies:
- dependency-name: dropshot
  dependency-version: 0.17.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]