Fix C# boolean "Prints" comments in documentation

doc/classes/StringName.xml

@@ -122,8 +122,8 @@
 				print("I" in "team")         # Prints false
 				[/gdscript]
 				[csharp]
-				GD.Print("Node".Contains("de")); // Prints true
-				GD.Print("team".Contains("I"));  // Prints false
+				GD.Print("Node".Contains("de")); // Prints True
+				GD.Print("team".Contains("I"));  // Prints False
 				[/csharp]
 				[/codeblocks]
 				If you need to know where [param what] is within the string, use [method find]. See also [method containsn].