add knack labels

combat.tex

@@ -469,6 +469,7 @@ When a character has no space to swing a weapon -- either vertically or horizont
 
 \subsubsection{Stacking Damage}
 \index{Combat!Stacking Damage}
+\label{stackingDamage}
 
 Damage Bonuses cannot extend forever. If the Damage bonus ever exceeds +3 then 4 points of the bonus are replaced with a die. Therefore, what might usually be $1D6+4$ Damage becomes $2D6$ Damage.
 

knacks.tex

@@ -149,6 +149,7 @@ However, the rituals required to cast spells in this way require long periods of
 Casting as a resting action requires a full hour per \gls{mp} spent.
 
 \subsubsection{Snap Caster}
+\label{snapCaster}
 
 The character can cast spells with movements, rather than speech.
 They can ignore any parts of a spell which demand the caster speak, and instead focus on movement.