tut4: Add pause before figure

src/2025-12-09/presentation.tex

@@ -342,7 +342,7 @@
             \end{align*}
             \column{\kitthreecolumns}
             \centering
-            \begin{figure}[H]
+            \pause\begin{figure}[H]
                 \centering
 
                 \begin{tikzpicture}