Update backmatter intro for 1.6

Signed-off-by: James Dinan <[email protected]>

content/backmatter.tex

@@ -667,9 +667,10 @@ \chapter{Changes to this Document}\label{sec:changelog}
 
 \section{Version 1.6}
 \label{changelog:v1.6}
-Major changes in \openshmem[1.6] include the addition of the new
-\FUNC{shmem\_team\_ptr}, \FUNC{shmem\_ibget}, and \FUNC{shmem\_ibput}
-functions.
+Major changes in \openshmem[1.6] include the addition of inclusive and
+exclusive scan operations, session routines, support for multiple
+initialization and finalization calls, interleaved block transfer APIs, and the
+\FUNC{shmem\_team\_ptr} function.
 
 The following list describes the specific changes in \openshmem[1.6]:
 \begin{enumerate}