Bump dropshot from 9691d04 to e57d3af (#153)

Bumps [dropshot](https://github.com/oxidecomputer/dropshot) from `9691d04` to `e57d3af`.
- [Release notes](https://github.com/oxidecomputer/dropshot/releases)
- [Commits](oxidecomputer/dropshot@9691d04...e57d3af)

---
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>

Author: dependabot[bot]