Add link to combat instructions for solo/coop scenarios

sections/combat.tex

@@ -46,6 +46,7 @@ \subsection*{\pagetarget{Combatsetup}{Combat Setup}}
 Units must be placed in \textbf{descending} Initiative\index{Initiative} order.
 If there's a tie, place higher tier Units first.
 If there's still a tie, the players decide the order.
+Check the \pagelink{AI Units}{\textbf{Combat against AI}} section for combat instructions.
 \end{itemize}
 Unit setup when fighting \textbf{other players}:
 \begin{itemize}