docs: Prepare version 0.4.2 release notes

Change-Id: I36780f66b803b6049e5399fde6e1a097c40a65b3
diff --git a/docs/releases.rst b/docs/releases.rst
index ec161ff..58a213d 100644
--- a/docs/releases.rst
+++ b/docs/releases.rst
@@ -5,6 +5,7 @@
    :hidden:
    :maxdepth: 1
 
+   release-notes/release-notes-0.4.2
    release-notes/release-notes-0.4.1
    release-notes/release-notes-0.4.0
    release-notes/release-notes-0.3.2