Avoid deprecated Boost.Asio interfaces

Change-Id: I00d285893ff61619f49dff8a8a55d0d0e2c309a7
diff --git a/docs/release-notes/release-notes-0.2.0.rst b/docs/release-notes/release-notes-0.2.0.rst
index 89d7c08..52bb4e4 100644
--- a/docs/release-notes/release-notes-0.2.0.rst
+++ b/docs/release-notes/release-notes-0.2.0.rst
@@ -145,7 +145,7 @@
 
   Use versions that accept reference to ``io_service`` object.
 
-- ``Face::ioService`` method, use :ndn-cxx:`Face::getIoService` instead.
+- ``Face::ioService`` method, use ``Face::getIoService`` instead.
 
 - :ndn-cxx:`Interest` constructor that accepts name, individual selectors, and individual
   guiders as constructor parameters.