Move comment (#45568)

I think it is better to read the output of
TestForMammals method right after the method
invocation, following the same idea that
was implemented for FeedMammals method
with output right after the method calls

Author: kaiquekandykoga

docs/csharp/fundamentals/tutorials/snippets/safelycast/patternmatching/Program.cs

@@ -10,6 +10,9 @@
 SuperNova sn = new SuperNova();
 TestForMammals(g);
 TestForMammals(sn);
+// Output:
+// I am an animal.
+// SuperNova is not a Mammal
 
 static void FeedMammals(Animal a)
 {
@@ -38,9 +41,6 @@ static void TestForMammals(object o)
         Console.WriteLine($"{o.GetType().Name} is not a Mammal");
     }
 }
-// Output:
-// I am an animal.
-// SuperNova is not a Mammal
 
 class Animal
 {