Mix docs some fixes

Author: licaon-kter

content/tutorials/mix-010.md

@@ -8,7 +8,7 @@ MIX stands for Mediated Information eXchange and defined in
 MIX-CORE ([XEP-0369](https://xmpp.org/extensions/xep-0369.html)),
 MIX-PRESENCE ([XEP-0403](https://xmpp.org/extensions/xep-0403.html))
 and MIX-PAM ([XEP-0405](https://xmpp.org/extensions/xep-0405.html)).
-More concretely, ejabberd supports [MIX 0.13.0](https://xmpp.org/extensions/attic/xep-0369-0.13.0.html).
+More concretely, ejabberd supports [MIX 0.14.1](https://xmpp.org/extensions/attic/xep-0369-0.14.1.html).
 
 It is a work in progress extension for the XMPP protocol to build a
 group messaging protocol that does not rely on the presence
@@ -35,9 +35,8 @@ protocol to get up to speed on that specification.
 
 Here is a short walk through what can already be done.
 
-Please, note that this is a work in progress and that the
-specification can (and will) change significantly before it becomes
-stable. This blog post is based on XEP-0369 v0.1.
+Also note that the specification can (and will) change significantly before it becomes
+stable. These examples are based on [XEP-0369 v0.1](https://xmpp.org/extensions/attic/xep-0369-0.1.html).
 
 # Configuration