adds evil seedlings to Perennial Growth blacklist (#82391)

## About The Pull Request
i dont play botany at all so i didnt know this trait existed. evil
seedlings are pretty powerful beings and being able to mass produce an
army of them wasnt my intention, it was always meant to be just one
silly guy

## Why It's Good For The Game
it became apparent to me that armies of evil seedlings were being raised
to wreak havoc upon the station, which can become really unbalanced and
unfair considering how tanky one can be.

## Changelog
🆑
balance: evil seedlings can no longer be mass produced
/🆑

code/modules/hydroponics/plant_genes.dm

@@ -517,7 +517,10 @@
 	description = "It may be harvested multiple times from the same plant."
 	icon = "cubes-stacked"
 	/// Don't allow replica pods to be multi harvested, please.
-	seed_blacklist = list(/obj/item/seeds/replicapod)
+	seed_blacklist = list(
+		/obj/item/seeds/replicapod,
+		/obj/item/seeds/seedling/evil,
+	)
 	mutability_flags = PLANT_GENE_REMOVABLE | PLANT_GENE_MUTATABLE | PLANT_GENE_GRAFTABLE
 
 /*