Bump dropshot from fb254ad to 52d900a (#779)

* Bump dropshot from `fb254ad` to `52d900a`

Bumps [dropshot](https://github.com/oxidecomputer/dropshot) from `fb254ad` to `52d900a`.
- [Commits](oxidecomputer/dropshot@fb254ad...52d900a)

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

Signed-off-by: dependabot[bot] <support@github.com>

* log_headers

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Adam H. Leventhal <ahl@oxide.computer>

Author: dependabot[bot]

Cargo.lock

@@ -57,6 +57,7 @@ impl TestServer {
                 bind_address: "127.0.0.1:0".parse().unwrap(),
                 request_body_max_bytes: 1024,
                 default_handler_task_mode: dropshot::HandlerTaskMode::CancelOnDisconnect,
+                log_headers: Default::default(),
             },
             api,
             (),