Glowcap spread endurance loss is 10 times bigger (#56885)

Co-authored-by: MLGTASTICa <ak9bc01d@yahoo.com>

code/__DEFINES/botany.dm

@@ -40,3 +40,6 @@
 /// -- Flags for traits. --
 /// Caps the plant's yield at 5 instead of 10.
 #define TRAIT_HALVES_YIELD (1<<0)
+
+/// Define for how much endurance a glowcap loses per spread
+#define GLOWCAP_ENDURANCE_SPREAD_COST 20

code/game/objects/effects/glowshroom.dm

@@ -168,7 +168,7 @@
 			if(shroomCount >= placeCount)
 				continue
 
-			Decay(TRUE, 2) // Decay before spawning new mushrooms to reduce their endurance
+			Decay(TRUE, GLOWCAP_ENDURANCE_SPREAD_COST) // Decay before spawning new mushrooms to reduce their endurance
 			if(QDELETED(src)) //Decay can end us
 				return
 			var/obj/structure/glowshroom/child = new type(newLoc, myseed, TRUE, TRUE)