Fix species default skin tones (#40707)

fix so that all default Urist entities don't spawn with the same default human skin tone (cursed skin tone Urist McSlime)

(cherry picked from commit 8d9564c23856c342bc3a35834c462e659f5ebd5b)

Co-authored-by: Quantum-cross <7065792+Quantum-cross@users.noreply.github.com>

Content.Shared/Preferences/HumanoidCharacterProfile.cs

@@ -234,6 +234,7 @@ namespace Content.Shared.Preferences
             return new()
             {
                 Species = species,
+                Appearance = HumanoidCharacterAppearance.DefaultWithSpecies(species),
             };
         }