fix(esx_multicharacter): correct the chin_3 typo in the default skins

Both default skins spell the chin width key chin_13. skinchanger only
knows chin_1 through chin_4, so the value never reaches the ped and the
key is stored as junk in users.skin.

It also breaks the ped. SetFace reads every feature through
Normalise(weight, 10), which divides, so a missing chin_3 raises
"attempt to perform arithmetic on a nil value" at feature index 17.
Everything after that in ApplySkin is skipped: the remaining features,
the eye colour, the head overlays, the components and the props.

[core]/esx_multicharacter/config.lua

@@ -48,7 +48,7 @@ else
             jaw_2 = 0,
             chin_1 = 0,
             chin_2 = 0,
-            chin_13 = 0,
+            chin_3 = 0,
             chin_4 = 0,
             neck_thickness = 0,
             hair_1 = 76,
@@ -147,7 +147,7 @@ else
             jaw_2 = 0,
             chin_1 = -10,
             chin_2 = 10,
-            chin_13 = -10,
+            chin_3 = -10,
             chin_4 = 0,
             neck_thickness = -5,
             hair_1 = 43,