Changes the firing sound of the M44 combat revolver (#6356)

# About the pull request

changes the firing sound of the M44 revolver to a beefier one

# Explain why it's good for the game

after the damage buff the revolver has received, the gun feels notably
more punchier but i feel as if the firing sound has stayed behind in
that regard. it sounds like a peashooter. i think that with this change
it's an objectively better sounding weapon.
 
# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>


old vs new comparison


https://github.com/cmss13-devs/cmss13/assets/17518895/3886d975-2207-482c-93de-f85e90f45c19



</details>


# Changelog
:cl:
soundadd: The M44 combat revolver has had its firing sound changed.
/:cl:

code/modules/projectiles/guns/revolvers.dm

@@ -6,7 +6,7 @@
 	w_class = SIZE_MEDIUM
 
 	matter = list("metal" = 2000)
-	fire_sound = 'sound/weapons/gun_44mag_v3.ogg'
+	fire_sound = 'sound/weapons/gun_44mag_v4.ogg'
 	reload_sound = 'sound/weapons/gun_44mag_speed_loader.wav'
 	cocked_sound = 'sound/weapons/gun_revolver_spun.ogg'
 	unload_sound = 'sound/weapons/gun_44mag_open_chamber.wav'