Fix out of date docstring

Author: julianstirling

src/labthings_fastapi/actions/__init__.py

@@ -249,10 +249,6 @@ def run(self) -> None:
 
         See `.Invocation.status` for status values.
 
-        :raise Exception: any exception raised in the action function will
-            propagate through this method. Usually, this will just cause the
-            thread to terminate after setting ``status`` to ``ERROR`` and
-            saving the exception to ``self._exception``.
         """
         try:
             self.action.emit_changed_event(self.thing, self._status)