update the build files for gh-pages [ci skip]

learn.json

@@ -316,7 +316,7 @@
 				"url": "http://elm-lang.org/Libraries.elm"
 			}, {
 				"name": "#elm IRC Channel on Freenode",
-				"url": "https://botbot.me/freenode/elm/"
+				"url": "http://webchat.freenode.net/?channels=elm"
 			}]
 		}]
 	},