fix profiler document error description

docs/api/api_python/mindspore.profiler.rst

@@ -33,7 +33,7 @@ mindspore.profiler
 
         - **RuntimeError** – profiler已经开启。
         - **RuntimeError** – 停止Minddata采集后，不支持重复开启。
-        - **RuntimeError** – 如果start_profile参数设置为True。
+        - **RuntimeError** – 如果start_profile参数未设置或设置为True。
 
     .. py:method:: stop()
 

mindspore/python/mindspore/profiler/profiling.py

@@ -563,7 +563,7 @@ class Profiler:
         Raises:
             RuntimeError: If the profiler has already started.
             RuntimeError: If MD profiling has stopped, repeated start action is not supported.
-            RuntimeError: If the start_profile value is set to False.
+            RuntimeError: If the start_profile parameter is not set or is set to True.
 
         Examples:
              >>> class StopAtStep(Callback):