Updated logging.py

Updated logging.py for #9146

src/_pytest/logging.py

@@ -447,7 +447,10 @@ class LogCaptureFixture:
         self.handler.reset()
 
     def set_level(self, level: Union[int, str], logger: Optional[str] = None) -> None:
-        """Set the level of a logger for the duration of a test.
+        """Sets the threshold for this logger to level. Logging messages which are less 
+        severe than level will be ignored; logging messages which have severity level or 
+        higher will be emitted by whichever handler or handlers service this logger, unless
+        a handler’s level has been set to a higher severity level than level.
 
         .. versionchanged:: 3.4
             The levels of the loggers changed by this function will be