Switch example IRC port to 6697

6667 doesn't work since SASL was introduced.

Change-Id: I3758ad5e8059e51b493066a32d8ac4e6b65e2a0e

README.rst

@@ -172,7 +172,7 @@ Edit config.json contents, for example::
   {
   "irc_nick": "ptgbot",
   "irc_server": "irc.freenode.net",
-  "irc_port": 6667,
+  "irc_port": 6697,
   "irc_channel": "#testptg",
   "db_filename": "html/ptg.json",
   }

config.json.sample

@@ -2,7 +2,7 @@
   "irc_nick": "NICK",
   "irc_pass": "",
   "irc_server": "irc.freenode.net",
-  "irc_port": 6667,
+  "irc_port": 6697,
   "irc_channel": "#CHANNEL",
   "db_filename": "html/ptg.json"
 }