Changes a confusing healthscanner reading (#4910)

# About the pull request

Changes "Subject is brain-dead." to "Subject has taken extreme amounts
of brain damage." when scanning somebody with 100 brain damage.
# Explain why it's good for the game

Defibs also say ![why I changed
it](https://github.com/cmss13-devs/cmss13/assets/95509996/0861867f-8574-4c8e-9f2a-621d21f2be76)
when trying to revive a perma corpse. This change should help prevent
confusion about whether or not somebody is actually perma.
# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

![brain
damage](https://github.com/cmss13-devs/cmss13/assets/95509996/92a67848-6e6b-44a6-ac69-630d8922b7a0)

</details>

# Changelog
:cl: Ediblebomb
qol: Changed "Subject is brain-dead." to "Subject has taken extreme
amounts of brain damage." when scanning somebody with 100 brain damage.
/:cl:

code/modules/mob/living/living_healthscan.dm

@@ -441,7 +441,7 @@ GLOBAL_LIST_INIT(known_implants, subtypesof(/obj/item/implant))
 
 	data["ssd"] = null //clear the data in case we have an old input from a previous scan
 	if(target_mob.getBrainLoss() >= 100 || !target_mob.has_brain())
-		data["ssd"] = "Subject is brain-dead."
+		data["ssd"] = "Subject has taken extreme amounts of brain damage."
 	else if(target_mob.has_brain() && target_mob.stat != DEAD && ishuman(target_mob))
 		if(!target_mob.key)
 			data["ssd"] = "No soul detected." // they ghosted
@@ -586,7 +586,7 @@ GLOBAL_LIST_INIT(known_implants, subtypesof(/obj/item/implant))
 		if(!D.hidden[SCANNER])
 			dat += "\t<span class='scannerb'> *Warning: [D.form] Detected</span><span class='scanner'>\nName: [D.name].\nType: [D.spread].\nStage: [D.stage]/[D.max_stages].\nPossible Cure: [D.cure]</span>\n"
 	if (src.getBrainLoss() >= 100 || !src.has_brain())
-		dat += "\t<span class='scanner'> *Subject is <b>brain dead</b></span>.\n"
+		dat += "\t<span class='scanner'> *Subject has taken extreme amounts of <b>brain damage</b></span>.\n"
 
 	if(src.has_brain() && src.stat != DEAD && ishuman(src))
 		if(!src.key)