docs: ndn-tlv-ping => ndn-tools in README

refs #2525

Change-Id: I1042959c7989464bbab71e7525ac1584d855a283
diff --git a/docs/README.rst b/docs/README.rst
index 2f137a4..c1e0bba 100644
--- a/docs/README.rst
+++ b/docs/README.rst
@@ -14,8 +14,7 @@
    application <https://github.com/named-data/ChronoChat>`__
 -  `ChronoSync - Sync library for multiuser realtime applications for
    NDN <https://github.com/named-data/ChronoSync>`__
--  `ndn-tlv-ping - Ping Application For
-   NDN <https://github.com/named-data/ndn-tlv-ping>`__
+-  `ndn-tools - NDN Essential Tools <https://github.com/named-data/ndn-tools>`__
 -  `ndn-traffic-generator - Traffic Generator For
    NDN <https://github.com/named-data/ndn-traffic-generator>`__