bpo-21446: Update reload fixer to use importlib (GH-8391)

diff --git a/Doc/library/2to3.rst b/Doc/library/2to3.rst
index deb5e10..fa4b0a9 100644
--- a/Doc/library/2to3.rst
+++ b/Doc/library/2to3.rst
@@ -385,7 +385,7 @@
 
 .. 2to3fixer:: reload
 
-   Converts :func:`reload` to :func:`imp.reload`.
+   Converts :func:`reload` to :func:`importlib.reload`.
 
 .. 2to3fixer:: renames