Update logging.config.listen() docstrings to mention dictConfig() (GH-155479)

logging.config.listen() docstring had omitted dictConfig() support.
(cherry picked from commit 791b573)

Co-authored-by: stevens <lipengyu@kylinos.cn>

Author: lpyu001

Lib/logging/config.py

@@ -952,8 +952,9 @@ def listen(port=DEFAULT_LOGGING_CONFIG_PORT, verify=None):
     Start up a socket server on the specified port, and listen for new
     configurations.
 
-    These will be sent as a file suitable for processing by fileConfig().
-    Returns a Thread object on which you can call start() to start the server,
+    These will be sent as a file suitable for processing by dictConfig() or
+    fileConfig(). Returns a Thread object on which you can call start() to
+    start the server,
     and which you can join() when appropriate. To stop the server, call
     stopListening().
 
@@ -971,16 +972,16 @@ class ConfigStreamHandler(StreamRequestHandler):
         """
         Handler for a logging configuration request.
 
-        It expects a completely new logging configuration and uses fileConfig
-        to install it.
+        It expects a completely new logging configuration and uses dictConfig
+        or fileConfig to install it.
         """
         def handle(self):
             """
             Handle a request.
 
             Each request is expected to be a 4-byte length, packed using
             struct.pack(">L", n), followed by the config file.
-            Uses fileConfig() to do the grunt work.
+            Uses dictConfig() or fileConfig() to do the grunt work.
             """
             try:
                 conn = self.connection