correct "steam" to "stream"

presentation/jrwtc2019/texs/model.tex

@@ -290,7 +290,7 @@ otherwise the thread on the {\it wrong} SM is killed.
 \unefile{14}{0.5}{4};
 \unefile{14}{-0.5}{4};
 \draw (11.5+3,1.5) rectangle (17+3,-1.5);
-\node at (17.25,-1.25){{\sf steam queues }};
+\node at (17.25,-1.25){{\sf stream queues }};
 \node at (19.25,0.75){{\sf h-sq }};
 \node at (19.25,-.25){{\sf l-sq }};