Removed old Loc.GetString() use instances (#4155)

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>

Content.Server/Light/Components/PoweredLightComponent.cs

@@ -117,7 +117,7 @@ namespace Content.Server.Light.Components
 
             void Burn()
             {
-                Owner.PopupMessage(eventArgs.User, Loc.GetString("You burn your hand!"));
+                Owner.PopupMessage(eventArgs.User, Loc.GetString("powered-light-component-burn-hand"));
                 damageableComponent.ChangeDamage(DamageType.Heat, 20, false, Owner);
                 SoundSystem.Play(Filter.Pvs(Owner), "/Audio/Effects/lightburn.ogg", Owner);
             }