Core/Spells: Apply only 1.5 second cooldown to DK runes when spell misses its target

src/server/game/Entities/Player/Player.h

@@ -289,7 +289,12 @@ struct Areas
 };
 
 #define MAX_RUNES       6
-#define RUNE_COOLDOWN   10000
+
+enum RuneCooldowns
+{
+    RUNE_BASE_COOLDOWN  = 10000,
+    RUNE_MISS_COOLDOWN  = 1500,     // cooldown applied on runes when the spell misses
+};
 
 enum RuneType
 {