docs: update several URLs to point to docs.named-data.net

Change-Id: If000753573c6a50130dc3101a411b6d482ccf3ed
diff --git a/docs/release-notes/release-notes-0.5.0.rst b/docs/release-notes/release-notes-0.5.0.rst
index 6c6a750..7310816 100644
--- a/docs/release-notes/release-notes-0.5.0.rst
+++ b/docs/release-notes/release-notes-0.5.0.rst
@@ -113,7 +113,7 @@
   ``security::v1::PublicKey``, ``security::v1::Certificate``, ``security::v1::IdentityCertificate``,
   ``security::v1::CertificateExtension``, ``security::v1::CertificateSubjectDescription`` instead.
   The next release will feature `a new version of the NDN Certificate format
-  <https://named-data.net/doc/NDN-packet-spec/0.3/certificate.html>`__.
+  <https://docs.named-data.net/NDN-packet-spec/0.3/certificate.html>`__.
 
 Removed
 ^^^^^^^