Clarify MOVE_EFFECT_SLEEP sleep clause handling (#6161)

src/battle_ai_util.c

@@ -2398,6 +2398,7 @@ static inline bool32 IsMoveSleepClauseTrigger(u32 move)
         const struct AdditionalEffect *additionalEffect = GetMoveAdditionalEffectById(move, i);
         switch (additionalEffect->moveEffect)
         {
+        // Skip MOVE_EFFECT_SLEEP as moves with a secondary chance of applying sleep are allowed by Smogon's rules (ie. Relic Song)
         case MAX_EFFECT_EFFECT_SPORE_FOES:
         case MAX_EFFECT_YAWN_FOE:
             return TRUE;