Change huff emote from *huffs to *huff (#2671)

## About The Pull Request

Change key for huff emote from *huffs to *huff

## Why It's Good For The Game

*huffs breaks the pattern that every other emote uses and I thought it
was a custom emote people were doing because of it

## Proof Of Testing

It compiles

## Changelog

🆑
qol: *huffs has been changed to *huff.
/🆑

modular_skyrat/modules/emote_panel/code/emote_panel.dm

@@ -756,7 +756,7 @@
 /mob/living/proc/emote_huff()
 	set name = "~ Huff"
 	set category = "Emotes+"
-	usr.emote("huffs", intentional = TRUE)
+	usr.emote("huff", intentional = TRUE)
 
 /mob/living/proc/emote_etwitch()
 	set name = "~ Ears twitch"
@@ -1023,4 +1023,4 @@
 /mob/living/proc/emote_mggaow()
 	set name = "> Mggaow"
 	set category = "Emotes+"
-	usr.emote("mggaow", intentional = TRUE)
+	usr.emote("mggaow", intentional = TRUE)

modular_skyrat/modules/emotes/code/emotes.dm

@@ -332,7 +332,7 @@
 	message = "rolls their eyes."
 
 /datum/emote/living/huff
-	key = "huffs"
+	key = "huff"
 	key_third_person = "huffs"
 	message = "huffs!"