Fix typo in example output

Author: Jan-Olof Hendig

doc/Type/utf8.pod6

@@ -10,7 +10,7 @@ A C<utf8> is a subtype of Blob which is specifically uint8 data for holding UTF-
 encoded text.
 
     my utf8 $b = "hello".encode;
-    say $b[1].fmt("0x%X"); # OUTPUT: «0x69␤»
+    say $b[1].fmt("0x%X"); # OUTPUT: «0x65␤»
 
 =end pod