savegame example: clarify that CBOR can be read

The documentation talked about using CBOR to keep folk from reading,
where (of course) it merely makes it more obscure (and compact). Make
clear that this just makes it less easy and mention the tool that
makes it easy again.

Task-number: QTBUG-111228
Change-Id: I472acda4b7533db41ab0e78b694e0256b34d2b40
Reviewed-by: Marc Mutz <marc.mutz@qt.io>
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
(cherry picked from commit 56df9e5603b33d0fe6264c185030785b5587f8b6)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

examples/corelib/serialization/savegame/doc/src/savegame.qdoc

@@ -11,11 +11,12 @@
 
     Many games provide save functionality, so that the player's progress through
     the game can be saved and loaded at a later time. The process of saving a
-    game generally involves serializing each game object's member variables
-    to a file. Many formats can be used for this purpose, one of which is JSON.
-    With QJsonDocument, you also have the ability to serialize a document in a
-    \l {RFC 7049} {CBOR} format, which is great if you
-    don't want the save file to be readable, or if you need to keep the file size down.
+    game generally involves serializing each game object's member variables to a
+    file. Many formats can be used for this purpose, one of which is JSON.  With
+    QJsonDocument, you also have the ability to serialize a document in a \l
+    {RFC 7049} {CBOR} format, which is great if you don't want the save file to
+    be easy to read (but see \l {Parsing and displaying CBOR data} for how it \e
+    can be read), or if you need to keep the file size down.
 
     In this example, we'll demonstrate how to save and load a simple game to
     and from JSON and binary formats.