Fixes example snippet in Character.swift

Author: valeriyvan

stdlib/public/core/Character.swift

@@ -30,10 +30,10 @@
 /// string in a particular binary representation.
 ///
 ///     print("Unicode scalar value count: \(greeting.unicodeScalars.count)")
-///     // Prints "Unicode scalar value count: 15"
+///     // Prints "Unicode scalar value count: 8"
 ///
 ///     print("UTF-8 representation count: \(greeting.utf8.count)")
-///     // Prints "UTF-8 representation count: 18"
+///     // Prints "UTF-8 representation count: 11"
 ///
 /// Every `Character` instance is composed of one or more Unicode scalar values
 /// that are grouped together as an *extended grapheme cluster*. The way these