Add reference to 18.04 test framework documentation

Change-Id: I0f24e0f0fde0568161edf52f40c5b83877ed7130
Signed-off-by: Chris Luke <chrisy@flirble.org>
diff --git a/doxygen/test_framework_doc.md b/doxygen/test_framework_doc.md
index 256e7ab..cedd6d3 100644
--- a/doxygen/test_framework_doc.md
+++ b/doxygen/test_framework_doc.md
@@ -1,8 +1,10 @@
 Test Framework Documentation    {#test_framework_doc}
 ============================
 
-PyDoc generated documentation for the "make test" framework is available for the following releases
+PyDoc generated documentation for the "make test" framework is available for
+the following releases:
 
+- [Test framework documentation for VPP 18.04](https://docs.fd.io/vpp/18.04/vpp_make_test/html)
 - [Test framework documentation for VPP 18.01](https://docs.fd.io/vpp/18.01/vpp_make_test/html)
 - [Test framework documentation for VPP 17.10](https://docs.fd.io/vpp/17.10/vpp_make_test/html)
 - [Test framework documentation for VPP 17.04](https://docs.fd.io/vpp/17.04/vpp_make_test/html)