Add missing documentation for logger argument of shutil.make_archive
diff --git a/Doc/library/shutil.rst b/Doc/library/shutil.rst
index 98b249f..3126965 100644
--- a/Doc/library/shutil.rst
+++ b/Doc/library/shutil.rst
@@ -278,6 +278,8 @@
    *owner* and *group* are used when creating a tar archive. By default,
    uses the current owner and group.
 
+   *logger* is an instance of :class:`logging.Logger`.
+
    .. versionadded:: 2.7