Increase rarity on Biting Gale and Acid Wave runes

These aren't very tied to stats for players anyway but are very annoying when spammed by NPCs.  A potentially better solution is just to reduce the chance of attack runes spawning on NPCs similar to how Teleport is banned, but I'm in a hurry :p.

game/modules/tome/data/general/objects/scrolls.lua

@@ -258,7 +258,7 @@ newEntity{ base = "BASE_RUNE",
 newEntity{ base = "BASE_RUNE",
 	name = "biting gale rune",
 	level_range = {10, 50},
-	rarity = 20,
+	rarity = 35,
 	cost = 20,
 
 	inscription_kind = "attack",
@@ -274,7 +274,7 @@ newEntity{ base = "BASE_RUNE",
 newEntity{ base = "BASE_RUNE",
 	name = "acid wave rune",
 	level_range = {10, 50},
-	rarity = 20,
+	rarity = 35,
 	cost = 20,
 
 	inscription_kind = "attack",