Update expr-bodied-ctor.cs (#195)

Above the example, it is said:
"The following example defines a Location class whose constructor has a single string parameter named name.
The expression body definition assigns the argument to the Name property."

Author: Johnny Gérard

snippets/csharp/programming-guide/classes-and-structs/expr-bodied-ctor.cs

@@ -5,7 +5,7 @@ public class Location
 {
    private string locationName;
 
-   public Location(string name) => locationName = name;
+   public Location(string name) => Name = name;
 
    public string Name
    {