Avoid using deprecated ndn-cxx type aliases

Change-Id: I55fd500377698adc8035113bdff2d64091a36e07
diff --git a/src/lsa/name-lsa.hpp b/src/lsa/name-lsa.hpp
index 5d6e02b..1705abc 100644
--- a/src/lsa/name-lsa.hpp
+++ b/src/lsa/name-lsa.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2021,  The University of Memphis,
+ * Copyright (c) 2014-2023,  The University of Memphis,
  *                           Regents of the University of California,
  *                           Arizona Board of Regents.
  *
@@ -38,7 +38,7 @@
   NameLsa() = default;
 
   NameLsa(const ndn::Name& originRouter, uint64_t seqNo,
-          const ndn::time::system_clock::TimePoint& timepoint,
+          const ndn::time::system_clock::time_point& timepoint,
           const NamePrefixList& npl);
 
   NameLsa(const ndn::Block& block);