Fix note markup (#16805).

Patch by Tshepang Lekhonkhobe, reviewed by Georg Brandl.
diff --git a/Doc/library/socket.rst b/Doc/library/socket.rst
index 80e3fb2..f6c711e 100644
--- a/Doc/library/socket.rst
+++ b/Doc/library/socket.rst
@@ -562,6 +562,7 @@
    automatically closed when they are garbage-collected.
 
    .. note::
+
       :meth:`close()` releases the resource associated with a connection but
       does not necessarily close the connection immediately.  If you want
       to close the connection in a timely fashion, call :meth:`shutdown()`