Prepare release PSync 0.5.0

Refs: #5328
Change-Id: Idcde005541499f0fae3df0c4548c634b005410e8
diff --git a/docs/release-notes.rst b/docs/release-notes.rst
index 4da744b..d730155 100644
--- a/docs/release-notes.rst
+++ b/docs/release-notes.rst
@@ -1,4 +1,4 @@
 Release Notes
 =============
 
-.. include:: release-notes/release-notes-0.4.0.rst
+.. include:: release-notes/release-notes-0.5.0.rst