[3.7] Doc: Fix inconsistency in multiprocessing (GH-12273) (GH-12275)



(cherry picked from commit d9bd8ec2a40ea67bc4248a72943a409ee645ddf3)


Co-authored-by: Julien Palard <julien@palard.fr>
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index 6ed8f21..96e0dc8 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -1645,7 +1645,7 @@
       Connect a local manager object to a remote manager process::
 
       >>> from multiprocessing.managers import BaseManager
-      >>> m = BaseManager(address=('127.0.0.1', 5000), authkey=b'abc')
+      >>> m = BaseManager(address=('127.0.0.1', 50000), authkey=b'abc')
       >>> m.connect()
 
    .. method:: shutdown()