Minor README improvements; fix outdated URLs

Change-Id: Ia57f83892471ad85a2301ba4c8ab3df144581000
diff --git a/manpages/ndnputchunks.rst b/manpages/ndnputchunks.rst
index 441f9eb..f002a78 100644
--- a/manpages/ndnputchunks.rst
+++ b/manpages/ndnputchunks.rst
@@ -15,7 +15,7 @@
 Version and segment number components are appended to the specified *name* as needed,
 according to the `NDN naming conventions`_.
 
-.. _NDN naming conventions: https://named-data.net/publications/techreports/ndn-tr-22-2-ndn-memo-naming-conventions/
+.. _NDN naming conventions: https://named-data.net/publications/techreports/ndn-tr-22-3-ndn-memo-naming-conventions/
 
 Options
 -------