fixes some rand() loops (#87795)

## About The Pull Request

i in rand(x,y) doesnt work

i in 1 to rand(x,y) does

## Why It's Good For The Game

bugggs

ghommie stole my gbp

## Changelog

🆑
fix: fixed random dm modifiers & some life-like reagent reactions
/🆑

code/modules/deathmatch/deathmatch_modifier.dm

@@ -519,7 +519,7 @@
 			modifiers_pool -= modpath
 
 	///Pick global modifiers at random.
-	for(var/iteration in rand(3, 5))
+	for(var/iteration in 1 to rand(3, 5))
 		var/datum/deathmatch_modifier/modifier = GLOB.deathmatch_game.modifiers[pick_n_take(modifiers_pool)]
 		modifier.on_select(lobby)
 		modifier.on_start_game(lobby)