Add 3.4 overview to the list

Author: lenkis

doc/release/index.rst

@@ -120,6 +120,7 @@ For information about earlier versions, see :doc:`eol_versions`.
 ..  toctree::
     :maxdepth: 1
 
+    3.4.0
     3.3.0
     3.2.0
     3.1.0