fix(socket.io): align [SNTA] expected event-list with Plan 66 accessUpdated

Plan 66 added the `accessUpdated` socket.io event server-side (open-pryv.io
commit c13a773 et al.); the lib's allowed-events list was updated to
include it, but the corresponding test fixture in
components/pryv-socket.io/test/socket.io.test.js:138 still asserted the
pre-Plan-66 list (eventsChanged,streamsChanged,accessesChanged,disconnect,error).

CI has been red on master since the Plan 66 monitor+socket.io 3.1.0
bump landed (25787864547) and again on the Plan 68 3.2.0 release
(25914436096). Update the expected string to match.

Author: perki

components/pryv-socket.io/test/socket.io.test.js

@@ -135,7 +135,7 @@ describe('[SKIX] Socket.IO', function () {
       try {
         conn.socket.on('Bogus', () => {});
       } catch (e) {
-        return expect(e.message).to.equal('Unkown event [Bogus]. Allowed events are: eventsChanged,streamsChanged,accessesChanged,disconnect,error');
+        return expect(e.message).to.equal('Unkown event [Bogus]. Allowed events are: eventsChanged,streamsChanged,accessesChanged,accessUpdated,disconnect,error');
       }
       throw new Error('Should fail');
     });