update irc link (#299)

Author: Arhell

composer.json

@@ -8,7 +8,7 @@
         "issues": "https://github.com/yiisoft/yii2-apidoc/issues",
         "forum": "http://www.yiiframework.com/forum/",
         "wiki": "http://www.yiiframework.com/wiki/",
-        "irc": "irc://irc.freenode.net/yii",
+        "irc": "ircs://irc.libera.chat:6697/yii",
         "source": "https://github.com/yiisoft/yii2-apidoc"
     },
     "authors": [