Apply suggestions from code review of branch better-docstrings

Co-authored-by: Richard Bowman <richard.bowman@cantab.net>

src/openflexure_microscope_server/things/autofocus.py

@@ -197,7 +197,7 @@ class JPEGSharpnessMonitor:
 
     The ``run`` context manager is used to start monitoring the camera stream. Position
     monitoring happens during ``focus_rel``. Raw data can be retrieved with
-    ``data_dict`` and data with interpolate ``z`` positions  can be retrieved with
+    ``data_dict`` and data with interpolated ``z`` positions can be retrieved with
     move_data.
 
     A new JPEGSharpnessMonitor instance is created each time an action with the

src/openflexure_microscope_server/things/settings_manager.py

@@ -60,7 +60,7 @@ class SettingsManager(lt.Thing):
         initial_value=[],
         model=Sequence[str],
     )
-    """A list of strings that are included in the "state" metadata."""
+    """Keys from ``external_metadata`` that are included in the "state" metadata."""
 
     @lt.thing_action
     def update_external_metadata(