Makes dog beds anchored. (shiptest-ss13#3139)

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## About The Pull Request
Title.
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## Why It's Good For The Game
Mobs buckled can just. Walk with it.
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## Changelog

:cl:
fix: Dog beds start anchored now. Mobs can no longer move while buckled.
/:cl:

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code/game/objects/structures/beds_chairs/bed.dm

@@ -167,30 +167,26 @@
 	name = "dog bed"
 	icon_state = "dogbed"
 	desc = "A comfy-looking dog bed. You can even strap your pet in, in case the gravity turns off."
-	anchored = FALSE
+	anchored = TRUE
 	buildstacktype = /obj/item/stack/sheet/mineral/wood
 	buildstackamount = 10
 	var/mob/living/owner = null
 
 /obj/structure/bed/dogbed/ian
 	desc = "Ian's bed! Looks comfy."
 	name = "Ian's bed"
-	anchored = TRUE
 
 /obj/structure/bed/dogbed/cayenne
 	desc = "Seems kind of... fishy."
 	name = "Cayenne's bed"
-	anchored = TRUE
 
 /obj/structure/bed/dogbed/renault
 	desc = "Renault's bed! Looks comfy. A foxy person needs a foxy pet."
 	name = "Renault's bed"
-	anchored = TRUE
 
 /obj/structure/bed/dogbed/runtime
 	desc = "A comfy-looking cat bed. You can even strap your pet in, in case the gravity turns off."
 	name = "Runtime's bed"
-	anchored = TRUE
 
 /obj/structure/bed/dogbed/proc/update_owner(mob/living/M)
 	if(owner)