Apply suggestions from code review

Co-authored-by: Jean-Paul Calderone <exarkun@twistedmatrix.com>

src/allmydata/storage/http_client.py

@@ -368,7 +368,7 @@ class StorageClient(object):
         message_to_serialize: object = None,
         timeout: float = 60,
         **kwargs,
-    ) -> Deferred[IResponse]:
+    ) -> IResponse:
         """
         Like ``treq.request()``, but with optional secrets that get translated
         into corresponding HTTP headers.

src/allmydata/storage/http_server.py

@@ -107,7 +107,7 @@ def _authorization_decorator(required_secrets):
         @wraps(f)
         def route(self, request, *args, **kwargs):
             with start_action(
-                action_type="allmydata:storage:http-server:handle_request",
+                action_type="allmydata:storage:http-server:handle-request",
                 method=request.method,
                 path=request.path,
             ) as ctx: