Merge pull request #10894 from atjonathan/fix/twitch-syntax-error

Updated line on conditions for API usage.
The `<a>` was empty and unclosed (it's a word), which rendered the link invisible.

seed/challenges/01-front-end-development-certification/intermediate-ziplines.json

@@ -172,6 +172,7 @@
         "<strong>Hint:</strong> See an example call to Twitch.tv's JSONP API at <a href='http://forum.freecodecamp.com/t/use-the-twitchtv-json-api/19541' target='_blank'>http://forum.freecodecamp.com/t/use-the-twitchtv-json-api/19541</a>.",
         "<strong>Hint:</strong> The relevant documentation about this API call is here: <a href='https://github.com/justintv/Twitch-API/blob/master/v3_resources/streams.md#get-streamschannel' target='_blank'>https://github.com/justintv/Twitch-API/blob/master/v3_resources/streams.md#get-streamschannel</a>.",
         "<strong>Hint:</strong> Here's an array of the Twitch.tv usernames of people who regularly stream: <code>[\"ESL_SC2\", \"OgamingSC2\", \"cretetion\", \"freecodecamp\", \"storbeck\", \"habathcx\", \"RobotCaleb\", \"noobs2ninjas\"]</code>",
+        "<strong>UPDATE:</strong> Due to a change in conditions on API usage explained <a href='https://blog.twitch.tv/client-id-required-for-kraken-api-calls-afbb8e95f843#.f8hipkht1' target='_blank'>here</a>, use the sample API response we provide at <a href='https://gist.github.com/QuincyLarson/2ff6892f948d0b7118a99264fd9c1ce8' target='_blank'>https://gist.github.com/QuincyLarson/2ff6892f948d0b7118a99264fd9c1ce8</a>.",
         "Remember to use <a href='http://forum.freecodecamp.com/t/how-to-get-help-when-you-are-stuck/19514' target='_blank'>Read-Search-Ask</a> if you get stuck.",
         "When you are finished, click the \"I've completed this challenge\" button and include a link to your CodePen.",
         "You can get feedback on your project by sharing it with your friends on Facebook."