Prepare for 0.6.1 release

Change-Id: Iaf148b70c3e30a0cd6737239a769d54c24e43a80
Refs: #4497
diff --git a/docs/release-notes/release-notes-0.3.1.rst b/docs/release-notes/release-notes-0.3.1.rst
index 982d8bd..7f8a9f0 100644
--- a/docs/release-notes/release-notes-0.3.1.rst
+++ b/docs/release-notes/release-notes-0.3.1.rst
@@ -13,9 +13,9 @@
   - Add isConnected() in :ndn-cxx:`signal::Connection` and :ndn-cxx:`signal::ScopedConnection`
     (:issue:`2308`)
 
-  - Extend :ndn-cxx:`DummyClientFace` to process :ndn-cxx:`LocalControlHeader` (:issue:`2510`)
+  - Extend :ndn-cxx:`DummyClientFace` to process ``LocalControlHeader`` (:issue:`2510`)
 
-  - Add CachingPolicy to :ndn-cxx:`LocalControlHeader` (:issue:`2183`)
+  - Add CachingPolicy to ``LocalControlHeader`` (:issue:`2183`)
 
 Updates and bug fixes:
 ^^^^^^^^^^^^^^^^^^^^^^