Bump dropshot from 3b3821a to 33e158b (#655)

Bumps [dropshot](https://github.com/oxidecomputer/dropshot) from `3b3821a` to `33e158b`.
- [Commits](oxidecomputer/dropshot@3b3821a...33e158b)

---
updated-dependencies:
- dependency-name: dropshot
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>